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Cheap flights from Seattle (SEA) to Illinois from $71

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 6/25. 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.
SEA — ORD
Jun 7 — Jun 141
From?
To?
Fri 6/7
Fri 6/14
1 adult, Economy
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How far in advance should I book a flight from Seattle to Illinois?

Users have found that booking a flight from Seattle to Illinois at least 27 days early can save you up to 89% on average compared to booking a flight this week. If booking 27 days before your flight isn’t an option for you, users have found flights from Seattle to Illinois for as little as $338 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $598 for flights departing within the next 3 days.

What is the cheapest month to fly from Seattle to Illinois?

Flights from Seattle to Illinois lean towards being more expensive in July. Prices are generally better when you fly from Seattle to Illinois in February, with the cheapest ticket starting at $69.

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

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Seattle to Illinois as you normally would.

Cheap American Airlines flights from Seattle to Illinois

Explore cheap flight options specifically provided by American Airlines for the route between Seattle and Illinois. 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 look at some of the lowest-priced American Airlines flights heading from Seattle to Illinois. It's recommended that users confirm their flight details before booking.
Wed 8/1410:51 pmSEA - ORD
Nonstop4h 09mAmerican Airlines
Mon 8/197:10 pmORD - SEA
Nonstop4h 46mAmerican Airlines
Deal found 5/31$189
Tue 10/15:00 amSEA - STL
1 stop10h 23mAmerican Airlines
Tue 10/85:54 amSTL - SEA
1 stop6h 45mAmerican Airlines
Deal found 6/1$196
Wed 7/1010:52 pmSEA - ORD
Nonstop4h 08mAmerican Airlines
Sun 7/147:05 pmORD - SEA
Nonstop4h 53mAmerican Airlines
Deal found 6/1$254
Fri 8/1612:21 amSEA - ORD
1 stop7h 14mAmerican Airlines
Tue 8/207:10 pmORD - SEA
Nonstop4h 46mAmerican Airlines
Deal found 6/1$263
Tue 6/115:10 amSEA - SPI
1 stop7h 37mAmerican Airlines
Fri 6/143:12 pmSPI - SEA
1 stop8h 45mAmerican Airlines
Deal found 6/2$316
Fri 6/712:20 amSEA - ORD
1 stop7h 35mAmerican Airlines
Sat 6/155:15 pmORD - SEA
Nonstop4h 33mAmerican Airlines
Deal found 6/1$338
Tue 6/1112:20 amSEA - STL
1 stop6h 34mAmerican Airlines
Sun 6/165:27 amSTL - SEA
1 stop7h 20mAmerican Airlines
Deal found 6/1$347
Tue 6/1112:20 amSEA - ORD
1 stop7h 35mAmerican Airlines
Mon 6/175:05 amORD - SEA
1 stop7h 22mAmerican Airlines
Deal found 6/2$377
Tue 6/1112:20 amSEA - ORD
1 stop7h 35mAmerican Airlines
Tue 6/185:05 amORD - SEA
1 stop7h 22mAmerican Airlines
Deal found 6/1$378

Cheap Delta flights from Seattle to Illinois

Explore cheap flight options specifically provided by Delta for the route between Seattle and Illinois. 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.
Some of the best deals we've found on Delta flights traveling from Seattle to Illinois. Ensure the flight price, dates, time, and airline match your criteria before you book.
Sat 8/176:00 pmSEA - ORD
Nonstop3h 56mDelta
Tue 8/206:45 pmORD - SEA
Nonstop4h 40mDelta
Deal found 6/2$213
Wed 8/285:15 pmSEA - STL
1 stop5h 44mDelta
Mon 9/26:30 pmSTL - SEA
1 stop7h 27mDelta
Deal found 6/1$216
Tue 11/197:20 amSEA - STL
1 stop8h 37mDelta
Tue 12/36:59 pmSTL - SEA
1 stop7h 00mDelta
Deal found 5/31$221
Wed 9/412:35 amSEA - STL
1 stop7h 58mDelta
Mon 9/95:40 pmSTL - SEA
1 stop8h 14mDelta
Deal found 6/2$236
Thu 7/116:00 pmSEA - ORD
Nonstop3h 56mDelta
Tue 7/166:45 pmORD - SEA
Nonstop4h 40mDelta
Deal found 6/1$243
Wed 7/106:00 pmSEA - ORD
Nonstop3h 56mDelta
Sat 7/136:45 pmORD - SEA
Nonstop4h 40mDelta
Deal found 6/1$273
Wed 6/127:10 amSEA - ORD
Nonstop4h 04mDelta
Sun 6/166:55 amORD - SEA
Nonstop4h 30mDelta
Deal found 6/2$294
Mon 7/86:00 pmSEA - ORD
Nonstop3h 56mDelta
Wed 7/176:45 pmORD - SEA
Nonstop4h 40mDelta
Deal found 5/31$313
Thu 11/2111:45 amSEA - ORD
Nonstop3h 58mDelta
Sun 11/249:30 amORD - SEA
1 stop8h 50mDelta
Deal found 6/2$323

Cheap Seattle to Illinois flights in June & July 2024

Find cheap flight options from Seattle to Illinois 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.
Check out some of the best flight deals from Seattle to Illinois in 2024. More deals are always being added, so be sure to check back regularly.
Mon 6/108:59 pmSEA - ORD
1 stop7h 37mMultiple Airlines
Wed 6/128:23 pmORD - SEA
1 stop27h 42mMultiple Airlines
Deal found 5/31$182
Mon 6/109:49 pmSEA - ORD
1 stop29h 36mFrontier
Wed 6/128:23 pmORD - SEA
1 stop27h 42mFrontier
Deal found 5/31$185
Mon 6/109:49 pmSEA - MDW
1 stop28h 44mFrontier
Wed 6/128:58 pmMDW - SEA
1 stop27h 07mFrontier
Deal found 5/31$185
Mon 6/108:59 pmSEA - ORD
1 stop15h 29mMultiple Airlines
Thu 6/138:23 pmORD - SEA
1 stop14h 14mMultiple Airlines
Deal found 6/1$187
Sat 6/810:26 pmSEA - ORD
1 stop24h 14mFrontier
Wed 6/128:23 pmORD - SEA
1 stop27h 42mFrontier
Deal found 6/1$190
Mon 6/109:49 pmSEA - MDW
1 stop28h 44mFrontier
Wed 6/128:58 pmMDW - SEA
1 stop27h 07mFrontier
Deal found 6/2$190
Mon 6/108:59 pmSEA - ORD
1 stop7h 37mMultiple Airlines
Mon 6/176:00 amORD - SEA
Nonstop4h 31mMultiple Airlines
Deal found 5/31$191
Sun 6/910:58 pmSEA - MDW
1 stop28h 31mFrontier
Thu 6/138:43 pmMDW - SEA
1 stop13h 54mFrontier
Deal found 6/2$193
Thu 6/139:42 pmSEA - MDW
1 stop10h 49mFrontier
Thu 6/208:43 pmMDW - SEA
1 stop13h 54mFrontier
Deal found 6/1$200

Seattle to Illinois 2024 flight deals

Discover exclusive flight deals for travel between Seattle and Illinois 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.
Check out some of the best flight deals from Seattle to Illinois in 2024. More deals are always being added, so be sure to check back regularly.
Tue 10/296:06 pmSEA - ORD
Nonstop3h 53mAlaska Airlines
Sat 11/25:54 pmORD - SEA
Nonstop4h 41mAlaska Airlines
Deal found 6/1$149
Wed 9/41:35 pmSEA - STL
1 stop25h 53mSpirit Airlines
Mon 9/93:02 pmSTL - SEA
1 stop19h 43mSpirit Airlines
Deal found 6/1$153
Tue 9/1012:55 pmSEA - ORD
1 stop9h 45mUnited Airlines
Sat 9/147:15 amORD - SEA
Nonstop4h 33mUnited Airlines
Deal found 6/1$154
Wed 9/45:00 pmSEA - STL
2 stops22h 28mSpirit Airlines
Mon 9/93:02 pmSTL - SEA
1 stop19h 43mSpirit Airlines
Deal found 6/1$165
Tue 8/137:45 pmSEA - ORD
1 stop7h 30mAlaska Airlines
Tue 8/207:22 pmORD - SEA
Nonstop4h 38mAlaska Airlines
Deal found 5/31$168
Tue 10/19:12 pmSEA - STL
1 stop11h 34mSpirit Airlines
Tue 10/88:00 amSTL - SEA
1 stop14h 21mSpirit Airlines
Deal found 6/1$169
Wed 7/245:15 pmSEA - ORD
1 stop10h 39mMultiple Airlines
Tue 7/309:22 pmORD - SEA
Nonstop4h 37mMultiple Airlines
Deal found 6/2$174
Tue 9/107:10 amSEA - ORD
Nonstop4h 05mDelta
Fri 9/206:35 pmORD - SEA
Nonstop4h 50mDelta
Deal found 6/2$179
Thu 8/228:35 pmSEA - STL
1 stop14h 29mSpirit Airlines
Wed 8/281:59 pmSTL - SEA
1 stop7h 36mSpirit Airlines
Deal found 6/2$179

Non-stop flights to Illinois from Seattle

Discover non-stop flight options from Seattle to Illinois. 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.
For a shorter flight, select one of these non-stop flights from Seattle to Illinois. Those looking to potentially save on 1 or 2-stop flights from Seattle to Illinois should utilize the search form at the the top of the page.
Tue 10/296:06 pmSEA - ORD
Nonstop3h 53mAlaska Airlines
Sat 11/25:54 pmORD - SEA
Nonstop4h 41mAlaska Airlines
Deal found 6/1$149
Tue 9/107:10 amSEA - ORD
Nonstop4h 05mDelta
Fri 9/206:35 pmORD - SEA
Nonstop4h 50mDelta
Deal found 6/2$179
Wed 8/1410:51 pmSEA - ORD
Nonstop4h 09mAmerican Airlines
Mon 8/197:10 pmORD - SEA
Nonstop4h 46mAmerican Airlines
Deal found 5/31$189
Tue 9/1710:47 pmSEA - ORD
Nonstop3h 53mAlaska Airlines
Fri 9/206:00 amORD - SEA
Nonstop4h 34mAlaska Airlines
Deal found 6/1$191
Wed 8/145:15 pmSEA - ORD
Nonstop3h 58mUnited Airlines
Wed 8/214:15 pmORD - SEA
Nonstop4h 37mUnited Airlines
Deal found 6/1$198
Wed 7/36:07 amSEA - ORD
Nonstop4h 06mAlaska Airlines
Wed 7/109:22 pmORD - SEA
Nonstop4h 37mAlaska Airlines
Deal found 6/1$203
Sat 8/1710:45 pmSEA - ORD
Nonstop3h 55mAlaska Airlines
Tue 8/207:22 pmORD - SEA
Nonstop4h 38mAlaska Airlines
Deal found 6/2$204
Tue 10/87:00 amSEA - ORD
Nonstop4h 03mUnited Airlines
Sun 10/137:19 amORD - SEA
Nonstop4h 33mUnited Airlines
Deal found 5/31$205
Mon 7/1510:45 pmSEA - ORD
Nonstop3h 55mAlaska Airlines
Tue 7/239:22 pmORD - SEA
Nonstop4h 37mAlaska Airlines
Deal found 6/1$209

Seattle to Illinois flights leaving soon

Find last-minute flight options from Seattle to Illinois 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.
Consider one of these great deals we found on last-minute flights from Seattle to Illinois. It's wise to confirm all flight details are correct before booking.
Mon 6/108:59 pmSEA - ORD
1 stop7h 37mMultiple Airlines
Wed 6/128:23 pmORD - SEA
1 stop27h 42mMultiple Airlines
Deal found 5/31$182
Mon 6/109:49 pmSEA - ORD
1 stop29h 36mFrontier
Wed 6/128:23 pmORD - SEA
1 stop27h 42mFrontier
Deal found 5/31$185
Mon 6/109:49 pmSEA - MDW
1 stop28h 44mFrontier
Wed 6/128:58 pmMDW - SEA
1 stop27h 07mFrontier
Deal found 5/31$185
Mon 6/108:59 pmSEA - ORD
1 stop15h 29mMultiple Airlines
Thu 6/138:23 pmORD - SEA
1 stop14h 14mMultiple Airlines
Deal found 6/1$187
Sat 6/810:26 pmSEA - ORD
1 stop24h 14mFrontier
Wed 6/128:23 pmORD - SEA
1 stop27h 42mFrontier
Deal found 6/1$190
Mon 6/109:49 pmSEA - MDW
1 stop28h 44mFrontier
Wed 6/128:58 pmMDW - SEA
1 stop27h 07mFrontier
Deal found 6/2$190
Mon 6/108:59 pmSEA - ORD
1 stop7h 37mMultiple Airlines
Mon 6/176:00 amORD - SEA
Nonstop4h 31mMultiple Airlines
Deal found 5/31$191
Sun 6/910:58 pmSEA - MDW
1 stop28h 31mFrontier
Thu 6/138:43 pmMDW - SEA
1 stop13h 54mFrontier
Deal found 6/2$193
Mon 6/109:49 pmSEA - ORD
1 stop29h 36mFrontier
Mon 6/179:43 pmORD - SEA
1 stop23h 27mFrontier
Deal found 5/31$201

One-way flights to Illinois from Seattle

Search for one-way flight options from Seattle to Illinois. 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.
Some of the best available deals we've found on one-way flights from Seattle to Illinois. Those seeking round-trip flights from Seattle to Illinois should utilize the search form at the the top of the page.
Tue 6/259:41 pmSEA - STL
1 stop13h 24mSpirit Airlines
Deal found 6/1$71
Wed 9/119:38 amSEA - ORD
2 stops18h 03mSpirit Airlines
Deal found 6/1$74
Sat 8/316:00 pmSEA - ORD
Nonstop3h 56mDelta
Deal found 6/2$75
Wed 8/285:30 amSEA - ORD
1 stop10h 33mSpirit Airlines
Deal found 6/1$76
Tue 8/275:30 amSEA - ORD
1 stop10h 33mSpirit Airlines
Deal found 6/1$78
Mon 9/95:00 pmSEA - ORD
1 stop17h 12mSpirit Airlines
Deal found 6/2$79
Tue 6/259:41 pmSEA - ORD
1 stop6h 55mSpirit Airlines
Deal found 6/1$80
Wed 9/45:00 pmSEA - RFD
1 stop24h 00mMultiple Airlines
Deal found 6/2$80
Tue 6/259:41 pmSEA - ORD
1 stop6h 55mSpirit Airlines
Deal found 6/1$84

Find flights from Seattle to Illinois within your budget

Customize your flight search to find flights from Seattle to Illinois 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

$149 - $213

Route

Depart

Return

Price

Seattle/Tacoma IntlChicago O'Hare Intl

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Tue 10/29

Nonstop3h 53m

Chicago O'Hare Intl

Sat 11/2

Nonstop4h 41m

$149

Seattle/Tacoma IntlLambert-St Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Wed 9/4

1 stop25h 53m

Lambert-St Louis

Mon 9/9

1 stop19h 43m

$153

Seattle/Tacoma IntlChicago O'Hare Intl

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Tue 9/10

1 stop9h 45m

Chicago O'Hare Intl

Sat 9/14

Nonstop4h 33m

$154

Seattle/Tacoma IntlLambert-St Louis

SEA - STL

SEASTL

Seattle/Tacoma Intl

Wed 9/4

2 stops22h 28m

Lambert-St Louis

Mon 9/9

1 stop19h 43m

$165

Seattle/Tacoma IntlChicago O'Hare Intl

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Wed 7/24

1 stop10h 39m

Chicago O'Hare Intl

Tue 7/30

Nonstop4h 37m

$174

Seattle/Tacoma IntlChicago Midway

SEA - MDW

SEAMDW

Seattle/Tacoma Intl

Sat 8/17

1 stop10h 37m

Chicago Midway

Sat 8/24

1 stop11h 33m

$180

Seattle/Tacoma IntlChicago O'Hare Intl

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Wed 8/14

Nonstop4h 09m

Chicago O'Hare Intl

Mon 8/19

Nonstop4h 46m

$189

Seattle/Tacoma IntlChicago O'Hare Intl

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Thu 7/25

1 stop15h 20m

Chicago O'Hare Intl

Mon 7/29

1 stop15h 17m

$205

Seattle/Tacoma IntlChicago O'Hare Intl

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 8/17

Nonstop3h 56m

Chicago O'Hare Intl

Tue 8/20

Nonstop4h 40m

$213

Flights are sorted by cheapest first

Deals found on 6/1

No data available for this route at this time. Please check back soon.

Best time to book a flight from Seattle to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Seattle 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.

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated June 2, 2024.
Read reviews from past customers who have flown American Airlines, Delta and Alaska Airlines from Seattle to Illinois. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.2
Very good
5,949 reviews
Check prices

Food

7.3

Comfort

8.1

Overall

8.2

Boarding

8.3

Entertainment

7.8

Crew

8.7

Reviews

1 / 10

Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.

Southwest
8.2
Very good
5,949 reviews
Southwest
8.2
Very good
5,949 reviews
Check prices

Food

7.3

Comfort

8.1

Overall

8.2

Boarding

8.3

Entertainment

7.8

Crew

8.7

Reviews

1 / 10

Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.

Alaska Airlines
8.1
Very good
9,198 reviews
Southwest
8.2
Very good
5,949 reviews
Check prices

Food

7.3

Comfort

8.1

Overall

8.2

Boarding

8.3

Entertainment

7.8

Crew

8.7

Reviews

1 / 10

Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.

Delta
8.0
Very good
10,410 reviews
Southwest
8.2
Very good
5,949 reviews
Check prices

Food

7.3

Comfort

8.1

Overall

8.2

Boarding

8.3

Entertainment

7.8

Crew

8.7

Reviews

1 / 10

Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.

WestJet
7.5
Good
2,861 reviews
Southwest
8.2
Very good
5,949 reviews
Check prices

Food

7.3

Comfort

8.1

Overall

8.2

Boarding

8.3

Entertainment

7.8

Crew

8.7

Reviews

1 / 10

Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.

United Airlines
7.4
Good
10,755 reviews
Southwest
8.2
Very good
5,949 reviews
Check prices

Food

7.3

Comfort

8.1

Overall

8.2

Boarding

8.3

Entertainment

7.8

Crew

8.7

Reviews

1 / 10

Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.

Related info for your journey

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

  • What airport do you fly from for flights from Seattle to Illinois?

    Most people fly from Seattle/Tacoma Intl (SEA) if they book a flight from Seattle to Illinois. Seattle/Tacoma Intl is conveniently located just 11.4 mi from Seattle’s city center.

  • Can I find flights from Seattle to Illinois for under $200 on Cheapflights?

    Yes, there are multiple flights from Seattle to Illinois for under $200. The cheapest flight booked recently is on Alaska Airlines for just $149, but on average you can expect to pay $175.

  • Are there nonstop flights from Seattle to Illinois for under $200 on Cheapflights?

    Cheapflights has at least 20 direct flights from Seattle to Illinois under $200. A good price for a nonstop flight from Seattle to Illinois is less than $214.

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

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

  • What days are nonstop flights available from Seattle to Illinois?

    Days when nonstop flights are available for this flight are: Sunday, Monday, Tuesday, Wednesday, Thursday, Friday.

  • How many flights depart from Seattle to Illinois on average per day?

    Per day, 23 flights depart from Seattle to Illinois on average.
    Morning (6am - Noon) - 43% of flight departures
    Afternoon (Noon - 6pm) - 22% of flight departures
    Evening (6pm - Midnight) - 35% of flight departures

  • How long is the flight from Seattle to Illinois?

    Airlines like Alaska Airlines, Spirit Airlines, and United Airlines fly from Seattle to Illinois in about 3h 53m. The time it takes to get you to your destination can typically vary by up to 22h. The distance between Seattle and Illinois is about 1725 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Seattle to Illinois one-way?

    The cheapest airlines for a one-way flight from Seattle to Illinois are Spirit Airlines ($71), Delta ($75), and American Airlines ($85).

  • What are the most popular routes from Seattle to Illinois?

    The most popular flight routes from Seattle to Illinois are Seattle/Tacoma Intl - Chicago O'Hare Intl, Seattle/Tacoma Intl - Chicago Midway and Seattle/Tacoma Intl - Lambert-St Louis.

  • What are the most reliable airlines from Seattle to Illinois?

    No one likes to see their flight delayed. When booking a flight from Seattle to Illinois consider choosing Royal Jordanian (100%), Scandinavian Airlines (95%) or SWISS (95%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Seattle to Illinois?

    On average you can expect to pay $1,121 for a flight from Seattle to Illinois. The cheapest flight overall is $101 while the most popular route, (Seattle/Tacoma Intl - Chicago O'Hare Intl) is currently priced at $149.

  • What does SEA to ORD mean?

    These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Seattle/Tacoma Intl Airport to Chicago O'Hare Intl Airport flight would often be abbreviated as a SEA to ORD flight. Ready for more IATA code knowledge? These are related airports for your current travel destination: Chicago Midway Airport (MDW), Moline Quad-City Airport (MLI), Greater Peoria Airport (PIA), Bloomington-Normal Airport (BMI), Springfield Capital Airport (SPI).

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

    The amount of baggage you can bring on your Seattle to Illinois 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 Seattle to Illinois with specific airlines?

    Yes, Cheapflights allows you to browse and filter Seattle to Illinois 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 Seattle to Illinois that include hotel bookings?

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

  • How can I find direct flights from Seattle to Illinois?

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

  • Can I find deals for business class flights from Seattle to Illinois?

    Yes. Cheapflights offers flight deals from Seattle to Illinois 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 Seattle to Illinois that allow pets onboard?

    Many airlines flying from Seattle to Illinois 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 Seattle to Illinois?

    Yes, you can often find last-minute deals on Seattle to Illinois 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 Seattle to Illinois flight deals updated?

    The Seattle to Illinois flight deals you see on this page were last updated on 6/2.

  • What are the most popular airlines that fly from Seattle to Illinois?

    The most popular airlines flying from Seattle to Illinois are American Airlines, Alaska Airlines and Delta. Something to consider prior to booking your flight.

  • What is the cheapest month to book a flight from Seattle to Illinois?

    Currently, February is the cheapest month in which you can book a flight from Seattle to Illinois (average of $244). Flying from Seattle to Illinois in June is currently the most expensive (average of $326). 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.

See more FAQs

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Alternative routes for Seattle to Illinois
See prices for flight routes from nearby airports that may be better suited for you.

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Top 6 airlines flying from Seattle to Illinois

Discover the top 6 airlines that operate flights from Seattle to Illinois. 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
DeltaCheapest$84Average$433FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Alaska AirlinesCheapest$99Average$480FlexibilityNo cancel feeOn-time75%
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American AirlinesCheapest$108Average$521FlexibilityNo cancel feeOn-time71%
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United AirlinesCheapest$116Average$557FlexibilityNo cancel feeOn-time69%
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FrontierCheapest$121Average$204FlexibilityNo cancel feeOn-time62%
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Spirit AirlinesCheapest$129Average$314FlexibilityNo cancel feeOn-time65%
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Search flights from Seattle to Illinois by cabin class

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

Find hourly flight availability from Seattle to Illinois. 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
47%of flight departuresMorning6 am to noon
39%of flight departuresAfternoonNoon to 6 pm
13%of flight departuresEvening6 pm to midnight
Midnight
6 AM
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6 PM

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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Seattle to Illinois?

Cheapflights helps you search for flights from Seattle to Illinois via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Seattle to Illinois?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Seattle to Illinois for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Seattle to Illinois with no change fees?

Yes, we can. To see specific flights from Seattle to Illinois with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Seattle to Illinois become cheaper?

Yes, Cheapflights offers price alerts on Seattle to Illinois flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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