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Cheap flights from Idaho Falls to St. Louis (IDA - STL) from $571

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 6/9. 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
May 7 — May 141
From?
To?
Tue 5/7
Tue 5/14
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 May 2, 2024.

Popular in

March

Cheapest in

September

Average price

$752

Round-trip from

$322
High demand for flights, 26% potential price rise
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Best time to find cheap flights, 41% potential price drop
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Average for round-trip flights in May 2024
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From Idaho Falls Fanning Field to Lambert-St Louis
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What is the cheapest day to fly round-trip from Idaho Falls to St. Louis?

Thursday 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 $632 for the month, but tickets can be as low as $375. Due to multiple factors, prepare for potentially higher prices in March.

When is the cheapest time to fly from Idaho Falls to St. Louis (IDA - STL)?

Unlike in the afternoon, 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 at noon.

Cheap Delta flights from Idaho Falls to St. Louis

Explore cheap flight options specifically provided by Delta 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 2,899,487 searches. Data last updated May 2, 2024.
Peruse some of the lowest-priced Delta 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.
Sun 6/97:00 pmIDA - STL
1 stop4h 58mDelta
Fri 6/146:25 pmSTL - IDA
1 stop4h 52mDelta
Deal found 4/30$571
Sun 6/97:00 pmIDA - STL
1 stop4h 58mDelta
Fri 6/146:25 pmSTL - IDA
1 stop4h 52mDelta
Deal found 5/1$576
Sun 6/97:00 pmIDA - STL
1 stop4h 58mDelta
Fri 6/1411:25 amSTL - IDA
2 stops11h 52mDelta
Deal found 4/30$581
Sun 6/96:10 amIDA - STL
2 stops9h 51mDelta
Fri 6/1411:25 amSTL - IDA
2 stops11h 52mDelta
Deal found 4/30$613
Wed 7/176:10 amIDA - STL
2 stops7h 24mDelta
Sun 7/216:30 pmSTL - IDA
1 stop4h 38mDelta
Deal found 5/1$677
Wed 7/177:00 pmIDA - STL
1 stop4h 39mDelta
Sun 7/216:30 pmSTL - IDA
1 stop4h 38mDelta
Deal found 4/30$771
Wed 7/176:10 amIDA - STL
2 stops7h 24mDelta
Sun 7/216:30 pmSTL - IDA
1 stop4h 38mDelta
Deal found 4/30$847
Wed 7/176:10 amIDA - STL
2 stops7h 24mDelta
Sun 7/212:10 pmSTL - IDA
2 stops8h 58mDelta
Deal found 5/1$918
Wed 7/176:10 amIDA - STL
2 stops7h 24mDelta
Sun 7/213:24 pmSTL - IDA
2 stops7h 44mDelta
Deal found 4/30$1,268

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 2,899,487 searches. Data last updated May 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.
Thu 7/42:35 pmIDA - STL
2 stops22h 43mUnited Airlines
Tue 7/95:30 pmSTL - IDA
2 stops24h 47mUnited Airlines
Deal found 4/30$684
Wed 8/75:58 pmIDA - STL
1 stop27h 13mUnited Airlines
Fri 8/96:20 amSTL - IDA
2 stops11h 57mUnited Airlines
Deal found 4/30$694
Wed 8/75:58 pmIDA - STL
1 stop27h 13mUnited Airlines
Fri 8/96:20 amSTL - IDA
2 stops11h 57mUnited Airlines
Deal found 5/1$704

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

Find cheap flight options from Idaho Falls to St. Louis specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,899,487 searches. Prices were last updated on May 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.
Sat 5/43:31 pmIDA - STL
1 stop7h 28mAlaska Airlines
Tue 5/77:00 amSTL - IDA
1 stop8h 51mAlaska Airlines
Deal found 4/29$744
Sat 5/41:30 pmIDA - STL
1 stop6h 45mDelta
Tue 5/712:00 pmSTL - IDA
2 stops10h 58mDelta
Deal found 4/29$754
Sat 5/46:00 amIDA - STL
2 stops9h 44mDelta
Tue 5/712:53 pmSTL - IDA
2 stops10h 05mDelta
Deal found 4/29$759
Sat 5/41:30 pmIDA - STL
1 stop6h 45mDelta
Tue 5/712:00 pmSTL - IDA
2 stops10h 58mDelta
Deal found 4/30$764
Sat 5/46:00 amIDA - STL
2 stops9h 44mDelta
Tue 5/712:53 pmSTL - IDA
2 stops10h 05mDelta
Deal found 4/30$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 2,899,487 searches. Data last updated May 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.
Sun 6/97:00 pmIDA - STL
1 stop4h 58mDelta
Fri 6/146:25 pmSTL - IDA
1 stop4h 52mDelta
Deal found 4/30$571
Sun 6/97:00 pmIDA - STL
1 stop4h 58mDelta
Fri 6/146:25 pmSTL - IDA
1 stop4h 52mDelta
Deal found 5/1$576
Sun 6/97:00 pmIDA - STL
1 stop4h 58mDelta
Fri 6/1411:25 amSTL - IDA
2 stops11h 52mDelta
Deal found 4/30$581
Sun 6/96:10 amIDA - STL
2 stops9h 51mDelta
Fri 6/1411:25 amSTL - IDA
2 stops11h 52mDelta
Deal found 4/30$613
Wed 7/176:10 amIDA - STL
2 stops7h 24mDelta
Sun 7/216:30 pmSTL - IDA
1 stop4h 38mDelta
Deal found 5/1$677
Thu 7/42:35 pmIDA - STL
2 stops22h 43mUnited Airlines
Tue 7/95:30 pmSTL - IDA
2 stops24h 47mUnited Airlines
Deal found 4/30$684
Wed 8/75:58 pmIDA - STL
1 stop27h 13mUnited Airlines
Fri 8/96:20 amSTL - IDA
2 stops11h 57mUnited Airlines
Deal found 4/30$694
Wed 8/75:58 pmIDA - STL
1 stop27h 13mUnited Airlines
Fri 8/96:20 amSTL - IDA
2 stops11h 57mUnited Airlines
Deal found 5/1$704
Sat 5/43:31 pmIDA - STL
1 stop7h 28mAlaska Airlines
Tue 5/77:00 amSTL - IDA
1 stop8h 51mAlaska Airlines
Deal found 4/29$744

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 2,899,487 searches. Data last updated May 2, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$571 - $1,077

Route

Depart

Return

Price

Idaho Falls Fanning FieldLambert-St Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

Sun 6/9

1 stop4h 58m

Lambert-St Louis

Fri 6/14

1 stop4h 52m

$571

Idaho Falls Fanning FieldLambert-St Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

Sun 6/9

1 stop4h 58m

Lambert-St Louis

Fri 6/14

1 stop4h 52m

$576

Idaho Falls Fanning FieldLambert-St Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

Sun 6/9

1 stop4h 58m

Lambert-St Louis

Fri 6/14

2 stops11h 52m

$581

Idaho Falls Fanning FieldLambert-St Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

Sun 6/9

2 stops9h 51m

Lambert-St Louis

Fri 6/14

2 stops11h 52m

$613

Idaho Falls Fanning FieldLambert-St Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

Thu 7/4

2 stops22h 43m

Lambert-St Louis

Tue 7/9

2 stops24h 47m

$684

Idaho Falls Fanning FieldLambert-St Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

Wed 8/7

1 stop27h 13m

Lambert-St Louis

Fri 8/9

2 stops11h 57m

$694

Idaho Falls Fanning FieldLambert-St Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

Wed 8/7

2 stops12h 16m

Lambert-St Louis

Fri 8/9

2 stops15h 59m

$762

Idaho Falls Fanning FieldLambert-St Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

Wed 8/7

2 stops12h 16m

Lambert-St Louis

Fri 8/9

2 stops15h 59m

$768

Idaho Falls Fanning FieldLambert-St Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

Wed 7/17

2 stops26h 29m

Lambert-St Louis

Sun 7/21

2 stops25h 26m

$1,077

Flights are sorted by cheapest first

Deals found on 4/30

When is the cheapest time 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 April 28, 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.
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Average price of flights to St. Louis by month

Plan your trip from Idaho Falls to St. Louis by taking into account the cheapest months to travel. The average price of a one-way flight from Idaho Falls to St. Louis is currently $0 while a round-trip flight costs $703. Price data was last updated on April 28, 2024.

Currently, September is the cheapest month in which you can book a flight from Idaho Falls to St. Louis (average of $322). Flying from Idaho Falls to St. Louis in July is currently the most expensive (average of $377). 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.

January

$326

February

$331

March

$357

April

$337

May

$345

June

$371

July

$377

August

$336

September

$322

October

$324

November

$336

December

$326

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 May 2, 2024.
Read through reviews of airlines operating flights from Idaho Falls to St. Louis, such as Delta, United Airlines and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.1
Very good
9,115 reviews
Check prices

Comfort

7.9

Crew

8.6

Food

7.3

Entertainment

7.3

Boarding

8.2

Overall

8.1

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Alaska Airlines
8.1
Very good
9,115 reviews
Alaska Airlines
8.1
Very good
9,115 reviews
Check prices

Comfort

7.9

Crew

8.6

Food

7.3

Entertainment

7.3

Boarding

8.2

Overall

8.1

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Delta
8.1
Very good
10,874 reviews
Alaska Airlines
8.1
Very good
9,115 reviews
Check prices

Comfort

7.9

Crew

8.6

Food

7.3

Entertainment

7.3

Boarding

8.2

Overall

8.1

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

United Airlines
7.4
Good
11,159 reviews
Alaska Airlines
8.1
Very good
9,115 reviews
Check prices

Comfort

7.9

Crew

8.6

Food

7.3

Entertainment

7.3

Boarding

8.2

Overall

8.1

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

American Airlines
7.3
Good
14,788 reviews
Alaska Airlines
8.1
Very good
9,115 reviews
Check prices

Comfort

7.9

Crew

8.6

Food

7.3

Entertainment

7.3

Boarding

8.2

Overall

8.1

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

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 Delta for just $571, but on average you can expect to pay $789.

  • 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 $571. Other airlines that can offer you cheap pricing are United Airlines, from $684, and American Airlines, from $762. Users have found that Delta is 9% 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 5/1.

See more FAQs

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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 2,899,487 searches. Data last updated May 2, 2024.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$395Average$654FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
DeltaCheapest$523Average$697FlexibilityNo 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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