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Cheap flights from Idaho Falls to St. Louis (IDA - STL) from $576

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/7. 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.
IDA — STL
Jun 7 — Jun 141
From?
To?
Fri 6/7
Fri 6/14
1 adult, Economy
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Cheap flight deals from Idaho Falls to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Idaho Falls (IDA) to St. Louis (STL). 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

March

Cheapest in

September

Average price

$693

Round-trip from

$319
High demand for flights, 23% potential price rise
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Best time to find cheap flights, 40% potential price drop
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Average for round-trip flights in June 2024
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From Idaho Falls Fanning Field to Lambert-St Louis
Search Deals

What is the cheapest day to fly round-trip from Idaho Falls to St. Louis?

Sunday flights are found to be more expensive to fly from Idaho Falls to St. Louis. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to St. Louis.

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

Our data shows that September tends to be the cheapest month to fly to St. Louis from Idaho Falls. Users have commonly found prices around $624 for the month, but tickets can be as low as $375. Due to multiple factors, prepare for potentially higher prices in March.

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

Unlike in the morning, when flights are generally more expensive, you can save up to 16% on flights from Idaho Falls to St. Louis by exploring options for tickets in the afternoon.

Cheap American Airlines flights from Idaho Falls to St. Louis

Explore cheap flight options specifically provided by American Airlines for the route between Idaho Falls and St. Louis. 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 Idaho Falls to St. Louis. Be sure to come back soon if the deals available don't appeal to you at this time.
Wed 8/71:41 pmIDA - STL
1 stop8h 07mAmerican Airlines
Fri 8/98:04 amSTL - IDA
1 stop6h 07mAmerican Airlines
Deal found 6/1$576
Thu 6/201:43 pmIDA - STL
1 stop18h 11mAmerican Airlines
Mon 6/246:00 amSTL - IDA
2 stops16h 43mAmerican Airlines
Deal found 5/31$744
Thu 6/206:32 amIDA - STL
2 stops14h 30mAmerican Airlines
Mon 6/246:00 amSTL - IDA
2 stops16h 43mAmerican Airlines
Deal found 5/31$869

Cheap United Airlines flights from Idaho Falls to St. Louis

Explore cheap flight options specifically provided by United Airlines for the route between Idaho Falls and St. Louis. 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.
To aid your search, here are some of the cheapest United Airlines flights we've found from Idaho Falls to St. Louis. Ensure the flight price, dates, time, and airline match your criteria before you book.
Wed 8/77:05 amIDA - STL
1 stop14h 06mUnited Airlines
Fri 8/95:30 pmSTL - IDA
2 stops24h 48mUnited Airlines
Deal found 6/1$584
Mon 6/245:56 pmIDA - STL
1 stop25h 53mUnited Airlines
Thu 6/271:45 pmSTL - IDA
1 stop8h 23mUnited Airlines
Deal found 6/1$590
Tue 6/255:56 pmIDA - STL
1 stop21h 33mUnited Airlines
Fri 6/285:30 pmSTL - IDA
2 stops17h 05mUnited Airlines
Deal found 6/1$595
Wed 8/75:59 pmIDA - STL
2 stops20h 41mUnited Airlines
Fri 8/95:30 pmSTL - IDA
2 stops24h 48mUnited Airlines
Deal found 6/1$615
Mon 6/245:56 pmIDA - STL
2 stops19h 18mUnited Airlines
Thu 6/271:45 pmSTL - IDA
1 stop8h 23mUnited Airlines
Deal found 6/1$630
Mon 6/245:56 pmIDA - STL
2 stops19h 18mUnited Airlines
Thu 6/276:20 amSTL - IDA
2 stops15h 48mUnited Airlines
Deal found 6/1$715
Wed 8/75:59 pmIDA - STL
3 stops21h 29mUnited Airlines
Fri 8/95:30 pmSTL - IDA
2 stops17h 05mUnited Airlines
Deal found 6/1$716

Cheap Idaho Falls to St. Louis flights in June & July 2024

Find cheap flight options from Idaho Falls to St. Louis 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.
Scroll through some of the best deals on flights from Idaho Falls to St. Louis in 2024. Check back regularly for other flight deals.
Mon 6/245:56 pmIDA - STL
1 stop25h 53mUnited Airlines
Thu 6/271:45 pmSTL - IDA
1 stop8h 23mUnited Airlines
Deal found 6/1$590
Tue 6/255:56 pmIDA - STL
1 stop21h 33mUnited Airlines
Fri 6/285:30 pmSTL - IDA
2 stops17h 05mUnited Airlines
Deal found 6/1$595
Mon 6/245:56 pmIDA - STL
2 stops19h 18mUnited Airlines
Thu 6/271:45 pmSTL - IDA
1 stop8h 23mUnited Airlines
Deal found 6/1$630
Thu 6/204:02 pmIDA - STL
1 stop6h 57mAlaska Airlines
Mon 6/247:32 pmSTL - IDA
1 stop20h 50mAlaska Airlines
Deal found 5/31$640
Mon 6/245:56 pmIDA - STL
2 stops19h 18mUnited Airlines
Thu 6/276:20 amSTL - IDA
2 stops15h 48mUnited Airlines
Deal found 6/1$715
Thu 6/201:43 pmIDA - STL
1 stop18h 11mAmerican Airlines
Mon 6/246:00 amSTL - IDA
2 stops16h 43mAmerican Airlines
Deal found 5/31$744
Tue 6/47:00 pmIDA - STL
1 stop4h 56mDelta
Tue 6/112:29 pmSTL - IDA
1 stop4h 47mDelta
Deal found 6/1$759
Tue 6/47:00 pmIDA - STL
1 stop4h 56mDelta
Tue 6/1111:25 amSTL - IDA
2 stops11h 52mDelta
Deal found 6/1$764
Tue 6/41:31 pmIDA - STL
2 stops9h 09mDelta
Tue 6/1111:25 amSTL - IDA
2 stops11h 52mDelta
Deal found 6/1$769

Idaho Falls to St. Louis 2024 flight deals

Discover exclusive flight deals for travel between Idaho Falls and St. Louis 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.
Scroll through some of the best deals on flights from Idaho Falls to St. Louis in 2024. Check back regularly for other flight deals.
Wed 8/71:41 pmIDA - STL
1 stop8h 07mAmerican Airlines
Fri 8/98:04 amSTL - IDA
1 stop6h 07mAmerican Airlines
Deal found 6/1$576
Wed 8/77:05 amIDA - STL
1 stop14h 06mUnited Airlines
Fri 8/95:30 pmSTL - IDA
2 stops24h 48mUnited Airlines
Deal found 6/1$584
Mon 6/245:56 pmIDA - STL
1 stop25h 53mUnited Airlines
Thu 6/271:45 pmSTL - IDA
1 stop8h 23mUnited Airlines
Deal found 6/1$590
Tue 6/255:56 pmIDA - STL
1 stop21h 33mUnited Airlines
Fri 6/285:30 pmSTL - IDA
2 stops17h 05mUnited Airlines
Deal found 6/1$595
Wed 8/75:59 pmIDA - STL
2 stops20h 41mUnited Airlines
Fri 8/95:30 pmSTL - IDA
2 stops24h 48mUnited Airlines
Deal found 6/1$615
Mon 6/245:56 pmIDA - STL
2 stops19h 18mUnited Airlines
Thu 6/271:45 pmSTL - IDA
1 stop8h 23mUnited Airlines
Deal found 6/1$630
Thu 6/204:02 pmIDA - STL
1 stop6h 57mAlaska Airlines
Mon 6/247:32 pmSTL - IDA
1 stop20h 50mAlaska Airlines
Deal found 5/31$640
Mon 6/245:56 pmIDA - STL
2 stops19h 18mUnited Airlines
Thu 6/276:20 amSTL - IDA
2 stops15h 48mUnited Airlines
Deal found 6/1$715
Wed 8/75:59 pmIDA - STL
3 stops21h 29mUnited Airlines
Fri 8/95:30 pmSTL - IDA
2 stops17h 05mUnited Airlines
Deal found 6/1$716

Find flights from Idaho Falls to St. Louis within your budget

Customize your flight search to find flights from Idaho Falls to St. Louis 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

$576 - $869

Route

Depart

Return

Price

Idaho Falls Fanning FieldLambert-St Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

Wed 8/7

1 stop8h 07m

Lambert-St Louis

Fri 8/9

1 stop6h 07m

$576

Idaho Falls Fanning FieldLambert-St Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

Wed 8/7

1 stop14h 06m

Lambert-St Louis

Fri 8/9

2 stops24h 48m

$584

Idaho Falls Fanning FieldLambert-St Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

Mon 6/24

1 stop25h 53m

Lambert-St Louis

Thu 6/27

1 stop8h 23m

$590

Idaho Falls Fanning FieldLambert-St Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

Tue 6/25

1 stop21h 33m

Lambert-St Louis

Fri 6/28

2 stops17h 05m

$595

Idaho Falls Fanning FieldLambert-St Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

Wed 8/7

2 stops20h 41m

Lambert-St Louis

Fri 8/9

2 stops24h 48m

$615

Idaho Falls Fanning FieldLambert-St Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

Mon 6/24

2 stops19h 18m

Lambert-St Louis

Thu 6/27

1 stop8h 23m

$630

Idaho Falls Fanning FieldLambert-St Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

Thu 6/20

1 stop6h 57m

Lambert-St Louis

Mon 6/24

1 stop20h 50m

$640

Idaho Falls Fanning FieldLambert-St Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

Thu 6/20

1 stop18h 11m

Lambert-St Louis

Mon 6/24

2 stops16h 43m

$744

Idaho Falls Fanning FieldLambert-St Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

Thu 6/20

2 stops14h 30m

Lambert-St Louis

Mon 6/24

2 stops16h 43m

$869

Flights are sorted by cheapest first

Deals found on 6/1

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

Use this chart to determine the cheapest time to fly round-trip from Idaho Falls to St. Louis. Price data was last updated on May 26, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Idaho Falls to St. Louis flight should consider departing on Monday afternoons when fares are most often at their lowest. Friday afternoons 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 Idaho Falls to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Idaho Falls 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 St. Louis by month

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

STL

Temperature

32 - 80.6 °F

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated June 2, 2024.
Read through reviews of airlines operating flights from Idaho Falls to St. Louis, such as American Airlines and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.1
Very good
9,198 reviews
Check prices

Crew

8.6

Boarding

8.2

Food

7.3

Entertainment

7.3

Overall

8.1

Comfort

7.9

Reviews

1 / 10

Crew and airport staff were excellent. They accommodated my needs and were super professional and kind.

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

Crew

8.6

Boarding

8.2

Food

7.3

Entertainment

7.3

Overall

8.1

Comfort

7.9

Reviews

1 / 10

Crew and airport staff were excellent. They accommodated my needs and were super professional and kind.

United Airlines
7.4
Good
10,754 reviews
Alaska Airlines
8.1
Very good
9,198 reviews
Check prices

Crew

8.6

Boarding

8.2

Food

7.3

Entertainment

7.3

Overall

8.1

Comfort

7.9

Reviews

1 / 10

Crew and airport staff were excellent. They accommodated my needs and were super professional and kind.

American Airlines
7.3
Good
14,268 reviews
Alaska Airlines
8.1
Very good
9,198 reviews
Check prices

Crew

8.6

Boarding

8.2

Food

7.3

Entertainment

7.3

Overall

8.1

Comfort

7.9

Reviews

1 / 10

Crew and airport staff were excellent. They accommodated my needs and were super professional and kind.

Related info for your journey

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

  • Can I find flights from Idaho Falls to St. Louis for under $600 on Cheapflights?

    Yes, there are multiple flights from Idaho Falls to St. Louis for under $600. The cheapest flight booked recently is on American Airlines for just $576, but on average you can expect to pay $661.

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

    Cheapflights users have booked flights from Idaho Falls to St. Louis round-trip from $576. Other airlines that can offer you cheap pricing are United Airlines, from $584, and Alaska Airlines, from $640. Users have found that American Airlines is 7% cheaper than the other options available to this destination.

  • What does IDA to STL mean?

    IDA and STL are unique codes to identify airports used in the aviation industry. They are defined by IATA (International Air Transport Association) and are commonly called IATA codes. IDA to STL refers to a flight route from Idaho Falls Fanning Field Airport to Lambert-St Louis Airport.

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

    The amount of baggage you can bring on your Idaho Falls to St. Louis 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 Idaho Falls to St. Louis with specific airlines?

    Yes, Cheapflights allows you to browse and filter Idaho Falls to St. Louis 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 Idaho Falls to St. Louis that include hotel bookings?

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

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

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

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

    Yes. Cheapflights offers flight deals from Idaho Falls to St. Louis 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 Idaho Falls to St. Louis that allow pets onboard?

    Many airlines flying from Idaho Falls to St. Louis 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 Idaho Falls to St. Louis?

    Yes, you can often find last-minute deals on Idaho Falls to St. Louis 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 Idaho Falls to St. Louis flight deals updated?

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

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

    Currently, September is the cheapest month in which you can book a flight from Idaho Falls to St. Louis (average of $319). Flying from Idaho Falls to St. Louis in July is currently the most expensive (average of $366). 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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Alternative routes for Idaho Falls to St. Louis
See prices for flight routes from nearby airports that may be better suited for you.

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Top 2 airlines flying from Idaho Falls to St. Louis

Discover the top 2 airlines that operate flights from Idaho Falls to St. Louis. 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
United AirlinesCheapest$392Average$654FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
DeltaCheapest$505Average$683FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
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Search flights from Idaho Falls to St. Louis by cabin class

Find flights from Idaho Falls to St. Louis, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Class
Business Class
Prem Econ Class
Economy Class

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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 Idaho Falls to St. Louis?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Idaho Falls to St. Louis. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Idaho Falls to St. Louis?

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

Can Cheapflights find flights from Idaho Falls to St. Louis with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Idaho Falls to St. Louis flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Idaho Falls to St. Louis become cheaper?

Yes, Cheapflights offers price alerts on Idaho Falls to St. Louis 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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