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Cheap flights from Idaho Falls to St. Louis (IDA - STL) from $269

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 7/12. 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
mei. 3 — mei. 101
From?
To?
vr 5/3
vr 5/10
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 april 28, 2024.

Popular in

March

Cheapest in

September

Round-trip from

$323

One-way from

$269
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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From Idaho Falls Fanning Field to Lambert-St Louis
Search Deals
One-way flight 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 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 2,944,896 searches. Data last updated april 28, 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.
za 5/46:38 amIDA - STL
1 stop6h 43mAmerican Airlines
di 5/75:21 amSTL - IDA
1 stop8h 23mAmerican Airlines
Deal found 4/27$689
wo 8/71:43 pmIDA - STL
2 stops18h 48mAmerican Airlines
vr 8/96:26 amSTL - IDA
2 stops15h 39mAmerican Airlines
Deal found 4/27$807

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 2,944,896 searches. Data last updated april 28, 2024.
To aid your search, here are some of the cheapest Delta flights we've found from Idaho Falls to St. Louis. Ensure the flight price, dates, time, and airline match your criteria before you book.
wo 8/77:00 pmIDA - STL
1 stop4h 36mDelta
vr 8/92:20 pmSTL - IDA
1 stop4h 56mDelta
Deal found 4/27$561
za 5/46:00 amIDA - STL
1 stop6h 31mDelta
di 5/73:05 pmSTL - IDA
2 stops7h 53mDelta
Deal found 4/27$699
za 5/46:00 amIDA - STL
2 stops9h 44mDelta
di 5/73:05 pmSTL - IDA
2 stops7h 53mDelta
Deal found 4/27$826

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

Find cheap flight options from Idaho Falls to St. Louis specifically for the months of April and May 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,944,896 searches. Prices were last updated on april 28, 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.
za 5/46:38 amIDA - STL
1 stop6h 43mAmerican Airlines
di 5/75:21 amSTL - IDA
1 stop8h 23mAmerican Airlines
Deal found 4/27$689
za 5/46:00 amIDA - STL
1 stop6h 31mDelta
di 5/73:05 pmSTL - IDA
2 stops7h 53mDelta
Deal found 4/27$699
di 4/303:31 pmIDA - STL
1 stop7h 28mAlaska Airlines
za 5/47:00 amSTL - IDA
1 stop8h 51mAlaska Airlines
Deal found 4/26$744
di 4/306:00 amIDA - STL
1 stop6h 31mDelta
za 5/46:13 amSTL - IDA
2 stops7h 36mDelta
Deal found 4/26$754
di 4/306:00 amIDA - STL
2 stops9h 50mDelta
za 5/411:49 amSTL - IDA
2 stops11h 16mDelta
Deal found 4/26$759
za 5/46:00 amIDA - STL
2 stops9h 44mDelta
di 5/73:05 pmSTL - IDA
2 stops7h 53mDelta
Deal found 4/27$826

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 2,944,896 searches. Data last updated april 28, 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.
wo 8/77:00 pmIDA - STL
1 stop4h 36mDelta
vr 8/92:20 pmSTL - IDA
1 stop4h 56mDelta
Deal found 4/27$561
wo 8/75:58 pmIDA - STL
1 stop27h 13mUnited Airlines
vr 8/96:20 amSTL - IDA
2 stops11h 57mUnited Airlines
Deal found 4/28$678
za 5/46:38 amIDA - STL
1 stop6h 43mAmerican Airlines
di 5/75:21 amSTL - IDA
1 stop8h 23mAmerican Airlines
Deal found 4/27$689
za 5/46:00 amIDA - STL
1 stop6h 31mDelta
di 5/73:05 pmSTL - IDA
2 stops7h 53mDelta
Deal found 4/27$699
di 4/303:31 pmIDA - STL
1 stop7h 28mAlaska Airlines
za 5/47:00 amSTL - IDA
1 stop8h 51mAlaska Airlines
Deal found 4/26$744
di 4/306:00 amIDA - STL
1 stop6h 31mDelta
za 5/46:13 amSTL - IDA
2 stops7h 36mDelta
Deal found 4/26$754
di 4/306:00 amIDA - STL
2 stops9h 50mDelta
za 5/411:49 amSTL - IDA
2 stops11h 16mDelta
Deal found 4/26$759
wo 8/71:43 pmIDA - STL
2 stops18h 48mAmerican Airlines
vr 8/96:26 amSTL - IDA
2 stops15h 39mAmerican Airlines
Deal found 4/27$807
wo 8/75:58 pmIDA - STL
2 stops17h 19mUnited Airlines
vr 8/96:20 amSTL - IDA
2 stops11h 57mUnited Airlines
Deal found 4/28$808

Idaho Falls to St. Louis flights leaving soon

Find last-minute flight options from Idaho Falls to St. Louis 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 2,944,896 searches. Data last updated april 28, 2024.
Have a look at some of the last-minute flights available departing from Idaho Falls to St. Louis. Tip: verify your flight details before completing your reservation.
za 5/46:38 amIDA - STL
1 stop6h 43mAmerican Airlines
di 5/75:21 amSTL - IDA
1 stop8h 23mAmerican Airlines
Deal found 4/27$689
za 5/46:00 amIDA - STL
1 stop6h 31mDelta
di 5/73:05 pmSTL - IDA
2 stops7h 53mDelta
Deal found 4/27$699
za 5/46:00 amIDA - STL
2 stops9h 44mDelta
di 5/73:05 pmSTL - IDA
2 stops7h 53mDelta
Deal found 4/27$826

One-way flights to St. Louis from Idaho Falls

Search for one-way flight options from Idaho Falls to St. Louis. 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 2,944,896 searches. Data last updated april 28, 2024.
Users in need of a one-way flight from Idaho Falls to St. Louis can choose from these deals. Those needing a return flight from Idaho Falls to St. Louis can use the search form above.
vr 7/125:58 pmIDA - STL
2 stops19h 38mUnited Airlines
Deal found 4/27$269
wo 6/194:02 pmIDA - STL
1 stop6h 57mAlaska Airlines
Deal found 4/28$279
wo 6/191:05 pmIDA - STL
2 stops9h 38mDelta
Deal found 4/28$288

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 2,944,896 searches. Data last updated april 28, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$561 - $808

Route

Depart

Return

Price

Idaho Falls Fanning FieldLambert-St Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

wo 8/7

1 stop4h 36m

Lambert-St Louis

vr 8/9

1 stop4h 56m

$561

Idaho Falls Fanning FieldLambert-St Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

wo 8/7

1 stop27h 13m

Lambert-St Louis

vr 8/9

2 stops11h 57m

$678

Idaho Falls Fanning FieldLambert-St Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

wo 8/7

2 stops18h 48m

Lambert-St Louis

vr 8/9

2 stops15h 39m

$807

Idaho Falls Fanning FieldLambert-St Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

wo 8/7

2 stops17h 19m

Lambert-St Louis

vr 8/9

2 stops11h 57m

$808

Flights are sorted by cheapest first

Deals found on 4/27

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 21, 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 $279 while a round-trip flight costs $714. Price data was last updated on April 21, 2024.

Currently, September is the cheapest month in which you can book a flight from Idaho Falls to St. Louis (average of $323). Flying from Idaho Falls to St. Louis in July is currently the most expensive (average of $378). 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

$350

June

$373

July

$378

August

$336

September

$323

October

$323

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 april 28, 2024.
Read through reviews of airlines operating flights from Idaho Falls to St. Louis, such as American Airlines, Delta 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
9,110 reviews
Check prices

Entertainment

7.3

Overall

8.1

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.6

Reviews

1 / 10

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

Alaska Airlines
8.1
Very good
9,110 reviews
Alaska Airlines
8.1
Very good
9,110 reviews
Check prices

Entertainment

7.3

Overall

8.1

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.6

Reviews

1 / 10

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

Delta
8.1
Very good
10,932 reviews
Alaska Airlines
8.1
Very good
9,110 reviews
Check prices

Entertainment

7.3

Overall

8.1

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.6

Reviews

1 / 10

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

United Airlines
7.4
Good
11,221 reviews
Alaska Airlines
8.1
Very good
9,110 reviews
Check prices

Entertainment

7.3

Overall

8.1

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.6

Reviews

1 / 10

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

American Airlines
7.3
Good
14,844 reviews
Alaska Airlines
8.1
Very good
9,110 reviews
Check prices

Entertainment

7.3

Overall

8.1

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.6

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 $561, but on average you can expect to pay $713.

  • Are there last-minute flights available from Idaho Falls to St. Louis for under $700?

    There are currently 3+ open flights from Idaho Falls to St. Louis within the next 7 days for less than $700.

  • 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 $561. Other airlines that can offer you cheap pricing are United Airlines, from $678, and American Airlines, from $807. Users have found that Delta is 11% cheaper than the other options available to this destination.

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

    The cheapest airlines for a one-way flight from Idaho Falls to St. Louis are United Airlines ($269), Alaska Airlines ($279), and Delta ($288).

  • 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 4/28.

See more FAQs

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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 2,944,896 searches. Data last updated april 28, 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
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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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