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Cheap flights from St. Louis to Seattle (STL - SEA) from $51

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/10. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
STL — SEA
Jun 7 — Jun 141
From?
To?
Fri 6/7
Fri 6/14
1 adult, Economy
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The best prices from Lambert-St Louis to Seattle/Tacoma Intl are usually found in January or February, booked 81 days in advance, depart on a Thursday or Monday and return on a Tuesday

Cheap flight deals from St. Louis to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated June 2, 2024.

Popular in

July

Cheapest in

January

Round-trip from

$247

One-way from

$98
High demand for flights, 32% potential price rise
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Best time to find cheap flights, 28% potential price drop
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From Lambert-St Louis to Seattle/Tacoma Intl
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One-way flight from Lambert-St Louis to Seattle/Tacoma Intl
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What is the cheapest day to fly round-trip from St. Louis to Seattle?

Leaving on a Wednesday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 17% on the overall cost on flights from St. Louis to Seattle.

How far in advance should I book a flight from St. Louis to Seattle?

Find a great deal and save up to 10% by booking at least 37 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from St. Louis to Seattle within the next two weeks, with the cheapest ticket starting at $278.

What is the cheapest month to fly from St. Louis to Seattle?

Flights from St. Louis to Seattle lean towards being more expensive in July. Prices are generally better when you fly from St. Louis to Seattle in January, with the cheapest ticket starting at $156.

What is the cheapest time of day to fly from STL to SEA?

Unlike in the evening, when flights are generally more expensive, you can save up to 29% on flights from St. Louis to Seattle by exploring options for tickets in the afternoon.

Cheap American Airlines flights from St. Louis to Seattle

Explore cheap flight options specifically provided by American Airlines for the route between St. Louis and Seattle. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,810,401 searches. Data last updated June 2, 2024.
Peruse some of the lowest-priced American Airlines flights we've found from St. Louis to Seattle. Deals update often to give you more flight options matching your criteria
Fri 8/164:22 pmSTL - SEA
1 stop7h 34mAmerican Airlines
Mon 8/1912:21 amSEA - STL
1 stop6h 43mAmerican Airlines
Deal found 6/1$211
Wed 10/92:38 pmSTL - SEA
1 stop10h 12mAmerican Airlines
Sun 10/1311:59 pmSEA - STL
1 stop8h 05mAmerican Airlines
Deal found 5/31$263
Fri 6/77:00 amSTL - SEA
1 stop7h 52mAmerican Airlines
Sat 6/85:10 amSEA - STL
1 stop7h 16mAmerican Airlines
Deal found 6/2$276
Sat 6/89:22 amSTL - SEA
1 stop10h 44mAmerican Airlines
Mon 6/101:14 amSEA - STL
1 stop9h 00mAmerican Airlines
Deal found 6/1$353
Tue 6/1112:44 pmSTL - SEA
1 stop8h 42mAmerican Airlines
Thu 6/1312:20 amSEA - STL
1 stop6h 34mAmerican Airlines
Deal found 6/2$401
Tue 6/113:27 pmSTL - SEA
1 stop9h 30mAmerican Airlines
Sat 6/226:10 pmSEA - STL
Nonstop3h 49mAmerican Airlines
Deal found 5/31$430
Wed 6/123:27 pmSTL - SEA
1 stop9h 30mAmerican Airlines
Sat 6/156:10 pmSEA - STL
Nonstop3h 49mAmerican Airlines
Deal found 6/2$432
Fri 6/71:42 pmSTL - SEA
1 stop8h 06mAmerican Airlines
Fri 6/712:20 amSEA - STL
1 stop6h 34mAmerican Airlines
Deal found 6/1$524
Sat 6/82:56 pmSTL - SEA
1 stop9h 01mAmerican Airlines
Sun 6/1612:20 amSEA - STL
1 stop6h 34mAmerican Airlines
Deal found 6/1$533

  • If you’re traveling from St. Louis to Seattle, one of the more common airlines traveling that route is American Airlines. Flights from American Airlines traveling this route typically cost $397.74 RT. This price is typically 53% more expensive than other airlines that offer St. Louis to Seattle flights. When booking this route, the cheapest RT price found was $170. The most popular departure airport in St. Louis when flying to Seattle is Lambert-St Louis Airport. The most popular airport to fly into when visiting Seattle is Seattle/Tacoma Intl Airport. When flying from St. Louis to Seattle, American Airlines flights are 11% more popular than any other airline flying that same route.

Cheap Delta flights from St. Louis to Seattle

Explore cheap flight options specifically provided by Delta for the route between St. Louis and Seattle. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,810,401 searches. Data last updated June 2, 2024.
Take a gander at the lowest prices we've found on Delta flights from St. Louis to Seattle. Make sure to examine the flight information before completing your reservation.
Tue 6/186:06 amSTL - SEA
1 stop6h 39mDelta
Wed 6/265:30 amSEA - STL
1 stop6h 04mDelta
Deal found 6/1$241
Tue 8/202:35 pmSTL - SEA
1 stop5h 49mDelta
Mon 8/2612:35 amSEA - STL
1 stop7h 58mDelta
Deal found 6/1$267
Tue 8/66:30 pmSTL - SEA
1 stop7h 29mDelta
Fri 8/1612:35 amSEA - STL
1 stop7h 58mDelta
Deal found 6/1$282
Sat 8/315:52 pmSTL - SEA
1 stop6h 33mDelta
Mon 9/912:30 amSEA - STL
1 stop7h 51mDelta
Deal found 6/1$337
Tue 6/116:25 pmSTL - SEA
1 stop7h 34mDelta
Sun 6/166:05 amSEA - STL
1 stop6h 28mDelta
Deal found 6/2$347
Tue 6/113:23 pmSTL - SEA
1 stop7h 14mDelta
Thu 6/136:05 amSEA - STL
1 stop8h 56mDelta
Deal found 6/2$357
Tue 6/116:06 amSTL - SEA
1 stop6h 39mDelta
Tue 6/1112:40 amSEA - STL
1 stop7h 55mDelta
Deal found 6/2$1,012

  • One of the most popular airlines traveling from St. Louis to Seattle is Delta. Flights from Delta traveling this route typically cost $453.15 RT. This price is typically 53% cheaper than other airlines that offer St. Louis to Seattle flights. When booking this route, the cheapest RT price found was $176. Lambert-St Louis Airport is the most common St. Louis airport to take off from when flying to Seattle. Seattle/Tacoma Intl Airport is the most popular arrival airport in Seattle. When flying from St. Louis to Seattle, Delta flights are 1% more popular than any other airline flying that same route.

Cheap St. Louis to Seattle flights in June & July 2024

Find cheap flight options from St. Louis to Seattle specifically for the months of June and July 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,810,401 searches. Prices were last updated on June 2, 2024.
These are some of the most attractive deals on flights from St. Louis to Seattle in 2024. More deals are always being added, so be sure to check back regularly.
Wed 6/127:29 pmSTL - SEA
1 stop28h 36mFrontier
Sat 6/159:00 amSEA - STL
1 stop10h 00mFrontier
Deal found 5/31$190
Tue 6/183:23 pmSTL - SEA
2 stops19h 09mSpirit Airlines
Tue 6/259:41 pmSEA - STL
1 stop13h 24mSpirit Airlines
Deal found 6/1$192
Tue 6/183:47 pmSTL - SEA
1 stop17h 19mMultiple Airlines
Tue 6/259:41 pmSEA - STL
1 stop13h 24mMultiple Airlines
Deal found 6/1$204
Sat 6/88:02 pmSTL - SEA
1 stop15h 08mFrontier
Mon 6/1710:03 pmSEA - STL
1 stop10h 39mFrontier
Deal found 6/1$206
Thu 6/137:29 pmSTL - SEA
1 stop15h 08mFrontier
Tue 6/188:12 pmSEA - STL
1 stop11h 17mFrontier
Deal found 6/1$210
Thu 6/137:29 pmSTL - SEA
1 stop15h 08mFrontier
Mon 6/1710:03 pmSEA - STL
1 stop10h 39mFrontier
Deal found 6/2$215
Thu 6/137:29 pmSTL - SEA
1 stop15h 08mFrontier
Fri 6/1410:03 pmSEA - STL
1 stop10h 39mFrontier
Deal found 6/2$217
Thu 6/207:29 pmSTL - SEA
1 stop15h 08mFrontier
Tue 7/28:12 pmSEA - STL
1 stop11h 17mFrontier
Deal found 5/31$224
Sat 6/88:02 pmSTL - SEA
1 stop15h 08mFrontier
Tue 6/118:12 pmSEA - STL
1 stop11h 17mFrontier
Deal found 6/1$229

St. Louis to Seattle 2024 flight deals

Discover exclusive flight deals for travel between St. Louis and Seattle in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,810,401 searches. Data last updated June 2, 2024.
These are some of the most attractive deals on flights from St. Louis to Seattle in 2024. More deals are always being added, so be sure to check back regularly.
Tue 8/207:29 pmSTL - SEA
1 stop17h 19mMultiple Airlines
Tue 8/278:35 pmSEA - STL
1 stop14h 29mMultiple Airlines
Deal found 6/1$147
Thu 9/56:18 pmSTL - SEA
1 stop16h 27mSpirit Airlines
Mon 9/99:12 pmSEA - STL
1 stop16h 29mSpirit Airlines
Deal found 5/31$181
Sat 9/288:00 amSTL - SEA
1 stop7h 58mSpirit Airlines
Tue 10/19:12 pmSEA - STL
1 stop11h 34mSpirit Airlines
Deal found 5/31$182
Thu 9/123:53 pmSTL - SEA
1 stop18h 44mFrontier
Sun 9/157:51 pmSEA - STL
1 stop12h 27mFrontier
Deal found 6/1$185
Tue 8/207:57 amSTL - SEA
3 stops35h 42mSpirit Airlines
Tue 8/278:35 pmSEA - STL
1 stop14h 29mSpirit Airlines
Deal found 6/1$187
Fri 8/238:00 pmSTL - SEA
1 stop14h 37mFrontier
Sat 8/317:51 pmSEA - STL
1 stop12h 27mFrontier
Deal found 5/31$188
Wed 6/127:29 pmSTL - SEA
1 stop28h 36mFrontier
Sat 6/159:00 amSEA - STL
1 stop10h 00mFrontier
Deal found 5/31$190
Tue 6/183:23 pmSTL - SEA
2 stops19h 09mSpirit Airlines
Tue 6/259:41 pmSEA - STL
1 stop13h 24mSpirit Airlines
Deal found 6/1$192
Thu 9/56:18 pmSTL - SEA
1 stop16h 27mSpirit Airlines
Mon 9/95:00 pmSEA - STL
2 stops20h 41mSpirit Airlines
Deal found 5/31$193

Non-stop flights to Seattle from St. Louis

Discover non-stop flight options from St. Louis to Seattle. Find direct flights with no layovers, providing a convenient travel experience. Explore non-stop flight options based on user searches, and compare prices and availability for your desired travel dates. Over the last 7 days, Cheapflights users made 2,810,401 searches. Data last updated June 2, 2024.
To help reduce your travel time, choose from one of these non-stop flights from St. Louis to Seattle. If you're looking for other options for flights from St. Louis to Seattle, make sure to update the search form at the top of page.
Wed 9/187:00 amSTL - SEA
Nonstop4h 26mAlaska Airlines
Wed 9/257:37 amSEA - STL
Nonstop3h 56mAlaska Airlines
Deal found 6/1$237
Fri 8/237:31 pmSTL - SEA
Nonstop4h 24mAlaska Airlines
Sat 8/317:37 amSEA - STL
Nonstop3h 56mAlaska Airlines
Deal found 5/31$257
Tue 8/207:00 amSTL - SEA
Nonstop4h 26mAlaska Airlines
Tue 8/276:08 pmSEA - STL
Nonstop3h 51mAlaska Airlines
Deal found 6/1$277
Fri 9/137:31 pmSTL - SEA
Nonstop4h 24mAlaska Airlines
Mon 9/236:08 pmSEA - STL
Nonstop3h 51mAlaska Airlines
Deal found 6/2$297
Sat 8/317:00 amSTL - SEA
Nonstop4h 26mAlaska Airlines
Tue 9/106:08 pmSEA - STL
Nonstop3h 51mAlaska Airlines
Deal found 6/1$307
Fri 9/277:00 amSTL - SEA
Nonstop4h 26mAlaska Airlines
Tue 10/17:35 amSEA - STL
Nonstop3h 53mAlaska Airlines
Deal found 5/31$317
Fri 8/167:32 pmSTL - SEA
Nonstop4h 28mAlaska Airlines
Tue 8/206:08 pmSEA - STL
Nonstop3h 51mAlaska Airlines
Deal found 6/1$322
Thu 8/227:31 pmSTL - SEA
Nonstop4h 24mAlaska Airlines
Mon 9/27:37 amSEA - STL
Nonstop3h 56mAlaska Airlines
Deal found 6/1$327
Sat 8/242:34 pmSTL - SEA
Nonstop4h 25mAlaska Airlines
Mon 9/27:37 amSEA - STL
Nonstop3h 56mAlaska Airlines
Deal found 6/1$347

St. Louis to Seattle flights leaving soon

Find last-minute flight options from St. Louis to Seattle for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 2,810,401 searches. Data last updated June 2, 2024.
Have a look at some of the flights available from St. Louis to Seattle departing last-minute. Users should double check the flight they book to ensure it matches the day, time, and destination they're looking for.
Wed 6/127:29 pmSTL - SEA
1 stop28h 36mFrontier
Sat 6/159:00 amSEA - STL
1 stop10h 00mFrontier
Deal found 5/31$190
Sat 6/88:02 pmSTL - SEA
1 stop15h 08mFrontier
Mon 6/1710:03 pmSEA - STL
1 stop10h 39mFrontier
Deal found 6/1$206
Sat 6/88:02 pmSTL - SEA
1 stop15h 08mFrontier
Tue 6/118:12 pmSEA - STL
1 stop11h 17mFrontier
Deal found 6/1$229
Wed 6/128:02 pmSTL - SEA
1 stop16h 24mFrontier
Thu 6/1310:58 pmSEA - STL
1 stop9h 44mFrontier
Deal found 6/2$230
Sun 6/96:05 pmSTL - SEA
1 stop15h 57mMultiple Airlines
Thu 6/1310:58 pmSEA - STL
1 stop9h 44mMultiple Airlines
Deal found 6/2$233
Mon 6/108:22 pmSTL - SEA
1 stop14h 17mFrontier
Wed 6/129:41 pmSEA - STL
1 stop14h 51mFrontier
Deal found 6/2$235
Sun 6/96:05 pmSTL - SEA
1 stop15h 57mMultiple Airlines
Wed 6/129:41 pmSEA - STL
1 stop14h 51mMultiple Airlines
Deal found 6/2$238
Tue 6/113:47 pmSTL - SEA
1 stop17h 19mFrontier
Fri 6/1410:03 pmSEA - STL
1 stop10h 39mFrontier
Deal found 6/2$244
Fri 6/75:36 pmSTL - SEA
1 stop18h 50mFrontier
Mon 6/1710:03 pmSEA - STL
1 stop10h 39mFrontier
Deal found 6/1$245

One-way flights to Seattle from St. Louis

Search for one-way flight options from St. Louis to Seattle. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 2,810,401 searches. Data last updated June 2, 2024.
If you're seeking multiple options on one-way flights from St. Louis to Seattle, be sure to check out these deals, which are updated often. Those seeking round-trip flights from St. Louis to Seattle should utilize the search form at the the top of the page.
Tue 9/108:00 amSTL - SEA
1 stop26h 45mSpirit Airlines
Deal found 6/1$51
Tue 9/108:00 amSTL - SEA
2 stops34h 02mSpirit Airlines
Deal found 6/1$64
Mon 9/93:02 pmSTL - SEA
1 stop19h 43mSpirit Airlines
Deal found 6/1$67
Mon 9/93:02 pmSTL - SEA
2 stops27h 00mSpirit Airlines
Deal found 6/1$80
Wed 6/191:55 pmSTL - SEA
1 stop8h 14mSpirit Airlines
Deal found 6/1$89
Tue 9/102:35 pmSTL - SEA
3 stops31h 46mSpirit Airlines
Deal found 6/1$94
Sat 9/218:00 amSTL - SEA
1 stop7h 58mSpirit Airlines
Deal found 6/1$96
Fri 7/53:07 pmSTL - SEA
1 stop7h 02mSpirit Airlines
Deal found 6/1$97
Tue 8/209:49 amSTL - SEA
1 stop7h 07mAmerican Airlines
Deal found 6/1$98

Find flights from St. Louis to Seattle within your budget

Customize your flight search to find flights from St. Louis to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,810,401 searches. Data last updated June 2, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$147 - $316

Route

Depart

Return

Price

Lambert-St LouisSeattle/Tacoma Intl

STL - SEA

STLSEA

Lambert-St Louis

Tue 8/20

1 stop17h 19m

Seattle/Tacoma Intl

Tue 8/27

1 stop14h 29m

$147

Lambert-St LouisSeattle/Tacoma Intl

STL - SEA

STLSEA

Lambert-St Louis

Tue 9/10

1 stop14h 21m

Seattle/Tacoma Intl

Mon 9/16

1 stop16h 29m

$153

Lambert-St LouisSeattle/Tacoma Intl

STL - SEA

STLSEA

Lambert-St Louis

Tue 9/3

Nonstop4h 26m

Seattle/Tacoma Intl

Tue 9/10

1 stop11h 34m

$164

Lambert-St LouisSeattle/Tacoma Intl

STL - SEA

STLSEA

Lambert-St Louis

Thu 9/5

1 stop16h 27m

Seattle/Tacoma Intl

Mon 9/9

1 stop16h 29m

$181

Lambert-St LouisSeattle/Tacoma Intl

STL - SEA

STLSEA

Lambert-St Louis

Thu 9/12

1 stop18h 44m

Seattle/Tacoma Intl

Sun 9/15

1 stop12h 27m

$185

Lambert-St LouisSeattle/Tacoma Intl

STL - SEA

STLSEA

Lambert-St Louis

Fri 8/16

1 stop7h 34m

Seattle/Tacoma Intl

Mon 8/19

1 stop6h 43m

$211

Lambert-St LouisSeattle/Tacoma Intl

STL - SEA

STLSEA

Lambert-St Louis

Tue 6/18

1 stop6h 39m

Seattle/Tacoma Intl

Wed 6/26

1 stop6h 04m

$241

Lambert-St LouisSeattle/Tacoma Intl

STL - SEA

STLSEA

Lambert-St Louis

Tue 8/20

Nonstop4h 26m

Seattle/Tacoma Intl

Tue 8/27

Nonstop3h 51m

$277

Lambert-St LouisSeattle/Tacoma Intl

STL - SEA

STLSEA

Lambert-St Louis

Sat 8/31

2 stops10h 43m

Seattle/Tacoma Intl

Tue 9/10

2 stops12h 43m

$316

Flights are sorted by cheapest first

Deals found on 6/1

How far ahead should I book a flight from St. Louis to Seattle?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Seattle. Price data was last updated on May 31, 2024.
The best time to book flights from St. Louis to Seattle is 81 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
Search Deals

What is the cheapest day to fly from St. Louis to Seattle?

Use this chart to determine the cheapest time to fly round-trip from St. Louis to Seattle. Price data was last updated on May 26, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their St. Louis to Seattle flight should consider departing on Wednesday afternoons when fares are most often at their lowest. Saturday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Best time to book a flight from St. Louis to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Temperature and rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average temperature and rainfall totals by month.

SEA

Temperature

41 - 66.2 °F

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated June 2, 2024.
See what other customers who have flown with American Airlines, Delta and Frontier from St. Louis to Seattle have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.1
Very good
9,198 reviews
Check prices

Boarding

8.2

Food

7.3

Entertainment

7.3

Crew

8.6

Comfort

7.9

Overall

8.1

Reviews

1 / 10

There were no major issues. A bit of delay but it was understandable. It was a good experience otherwise.

Alaska Airlines
8.1
Very good
9,198 reviews
Alaska Airlines
8.1
Very good
9,198 reviews
Check prices

Boarding

8.2

Food

7.3

Entertainment

7.3

Crew

8.6

Comfort

7.9

Overall

8.1

Reviews

1 / 10

There were no major issues. A bit of delay but it was understandable. It was a good experience otherwise.

Delta
8.0
Very good
10,410 reviews
Alaska Airlines
8.1
Very good
9,198 reviews
Check prices

Boarding

8.2

Food

7.3

Entertainment

7.3

Crew

8.6

Comfort

7.9

Overall

8.1

Reviews

1 / 10

There were no major issues. A bit of delay but it was understandable. It was a good experience otherwise.

United Airlines
7.4
Good
10,755 reviews
Alaska Airlines
8.1
Very good
9,198 reviews
Check prices

Boarding

8.2

Food

7.3

Entertainment

7.3

Crew

8.6

Comfort

7.9

Overall

8.1

Reviews

1 / 10

There were no major issues. A bit of delay but it was understandable. It was a good experience otherwise.

American Airlines
7.3
Good
14,260 reviews
Alaska Airlines
8.1
Very good
9,198 reviews
Check prices

Boarding

8.2

Food

7.3

Entertainment

7.3

Crew

8.6

Comfort

7.9

Overall

8.1

Reviews

1 / 10

There were no major issues. A bit of delay but it was understandable. It was a good experience otherwise.

Sun Country Air
7.2
Good
592 reviews
Alaska Airlines
8.1
Very good
9,198 reviews
Check prices

Boarding

8.2

Food

7.3

Entertainment

7.3

Crew

8.6

Comfort

7.9

Overall

8.1

Reviews

1 / 10

There were no major issues. A bit of delay but it was understandable. It was a good experience otherwise.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from St. Louis to Seattle?

    Booking a flight from Lambert-St Louis (STL) to Seattle/Tacoma Intl (SEA) is your only option if you wish to fly from St. Louis to Seattle. On a typical day, there are 6 flights from Lambert-St Louis to Seattle/Tacoma Intl, all of which are around 4h 19m for a nonstop flight. You can also purchase a plane ticket from 8 airlines when you book a flight from Lambert-St Louis to Seattle.

  • Can I find flights from St. Louis to Seattle for under $200 on Cheapflights?

    Yes, there are multiple flights from St. Louis to Seattle for under $200. The cheapest flight booked recently is on Multiple Airlines for just $147, but on average you can expect to pay $188.

  • Are there nonstop flights from St. Louis to Seattle for under $300 on Cheapflights?

    Cheapflights has at least 20 direct flights from St. Louis to Seattle under $300. A good price for a nonstop flight from St. Louis to Seattle is less than $378.

  • Are there last-minute flights available from St. Louis to Seattle for under $200?

    There are currently 20+ open flights from St. Louis to Seattle within the next 7 days for less than $200.

  • What days are nonstop flights available from St. Louis to Seattle?

    Nonstop flights can be found on the following days: Sunday, Monday, Wednesday, Thursday, Friday.

  • How popular is this St. Louis to Seattle flight route?

    Within the past month, 59 users have taken a look at flights from Lambert-St Louis to Seattle/Tacoma Intl.

  • How many flights depart from St. Louis to Seattle on average per day?

    Per day, 7 flights depart from St. Louis to Seattle on average.
    Morning (6am - Noon) - 43% of flight departures
    Evening (6pm - Midnight) - 57% of flight departures

  • How long is the flight from St. Louis to Seattle?

    Airlines like Spirit Airlines, Frontier, and American Airlines fly from St. Louis to Seattle in about 7h 34m. The time it takes to get you to your destination can typically vary by up to 11h 10m. There are 1714 mi between St. Louis and Seattle. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from St. Louis to Seattle round-trip?

    Currently priced at $153, Spirit Airlines will fly you from St. Louis to Seattle and back. In addition to Spirit Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Frontier and American Airlines - these airlines can fly you to your destination from $185 and $211, respectively. You may be able to fly from St. Louis to Seattle for 55% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from St. Louis to Seattle one-way?

    The cheapest airlines for a one-way flight from St. Louis to Seattle are Spirit Airlines ($51), American Airlines ($98), and Frontier ($100).

  • What are the most reliable airlines from St. Louis to Seattle?

    The top 3 most reliable airlines when flying from St. Louis to Seattle are Qatar Airways (93%), Japan Airlines (93%) and American Airlines (89%).

  • What are the cheapest flights from St. Louis to Seattle?

    Looking for the cheapest flight from St. Louis to Seattle? While on average our users pay $961, our data indicates the cheapest price to be $141. The most popular route (Lambert-St Louis - Seattle/Tacoma Intl), is priced around $132.

  • What does STL to SEA mean?

    STL stands for Lambert-St Louis Airport, while SEA stands for Seattle/Tacoma Intl Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry.

  • Where are the most common layover locations when flying from St. Louis to Seattle?

    St. Louis to Seattle flights have a layover in Salt Lake City most of the time.

  • What are some popular things to do or see while on a layover in Salt Lake City?

    Most Salt Lake City visitors opt to spend their time experiencing Temple Square, Family History Library, and Abravanel Hall. Temple Square, Family History Library, and Abravanel Hall can be accessed by traveling approximately 4.7 mi, 4.7 mi, and 4.7 mi, respectively from Salt Lake City. Travelers in need of a car in Salt Lake City can rent one for about $55 per day.

  • Where are the least popular layover locations for St. Louis to Seattle flights?

    The least popular layover on flights from St. Louis to Seattle is Denver.

  • Can I find deals for flights from St. Louis to Seattle that include extra baggage allowance?

    The amount of baggage you can bring on your St. Louis to Seattle flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from St. Louis to Seattle with specific airlines?

    Yes, Cheapflights allows you to browse and filter St. Louis to Seattle flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from St. Louis to Seattle that include hotel bookings?

    Yes. In addition to deals on St. Louis to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Seattle.

  • Can I find deals for business class flights from St. Louis to Seattle?

    Yes. Cheapflights offers flight deals from St. Louis to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from St. Louis to Seattle that allow pets onboard?

    Many airlines flying from St. Louis to Seattle offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from St. Louis to Seattle?

    Yes, you can often find last-minute deals on St. Louis to Seattle flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the St. Louis to Seattle flight deals updated?

    The St. Louis to Seattle flight deals you see on this page were last updated on 6/1.

  • What are the most popular airlines that fly from St. Louis to Seattle?

    Consider Undisclosed Carrier, American Airlines or Alaska Airlines when booking your flight. These represent the most popular airlines when flying from St. Louis to Seattle.

  • What is the cheapest month to book a flight from St. Louis to Seattle?

    Currently, January is the cheapest month in which you can book a flight from St. Louis to Seattle (average of $247). Flying from St. Louis to Seattle in July is currently the most expensive (average of $406). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Top 7 airlines flying from St. Louis to Seattle

Discover the top 7 airlines that operate flights from St. Louis to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,810,401 searches. Data last updated June 2, 2024.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$132Average$279FlexibilityNo cancel feeOn-time65%
Search Spirit Airlines flights
FrontierCheapest$152Average$225FlexibilityNo cancel feeOn-time62%
Search Frontier flights
DeltaCheapest$157Average$286FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Sun Country AirCheapest$169Average$384FlexibilityNo cancel feeOn-time83%
Search Sun Country Air flights
Alaska AirlinesCheapest$170Average$398FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
United AirlinesCheapest$174Average$329FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapest$176Average$453FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
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Search flights from St. Louis to Seattle by cabin class

Find flights from St. Louis to Seattle, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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Hourly flight availability from St. Louis to Seattle

Find hourly flight availability from St. Louis to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 2, 2024.
1%of flight departuresEarly morningMidnight to 6 am
41%of flight departuresMorning6 am to noon
33%of flight departuresAfternoonNoon to 6 pm
25%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

Weekly flight availability from St. Louis to Seattle

Explore weekly flight availability from St. Louis to Seattle. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated June 2, 2024.
Sunday4daily flights
Monday8daily flights
Tuesday6daily flights
Wednesday4daily flights
Thursday6daily flights
Friday8daily flights
Saturday6daily flights

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Deals for St. Louis to Seattle flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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Cheapflights helps you find that perfect flight to Seattle from St. Louis by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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Certainly. Search results for flights to Seattle from St. Louis shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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Of course! You can now track prices for flights from St. Louis to Seattle and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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