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Cheap flights from Idaho Falls to St. Louis (IDA - STL) from $540

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. 4 — jun. 111
From?
To?
mar. 6/4
mar. 6/11
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 mayo 30, 2024.

Popular in

March

Cheapest in

September

Average price

$651

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 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?

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 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 2,784,634 searches. Data last updated mayo 30, 2024.
mié. 8/77:05 amIDA - STL
1 stop14h 06mUnited Airlines
vie. 8/95:30 pmSTL - IDA
2 stops24h 48mUnited Airlines
Deal found 5/30$540
mié. 8/77:05 amIDA - STL
1 stop14h 06mUnited Airlines
vie. 8/94:36 pmSTL - IDA
1 stop25h 42mUnited Airlines
Deal found 5/30$545
jue. 7/47:05 amIDA - STL
1 stop4h 44mUnited Airlines
mar. 7/91:45 pmSTL - IDA
1 stop8h 23mUnited Airlines
Deal found 5/30$552
jue. 7/47:05 amIDA - STL
2 stops7h 35mUnited Airlines
mar. 7/91:45 pmSTL - IDA
1 stop8h 23mUnited Airlines
Deal found 5/30$557
jue. 7/410:45 amIDA - STL
1 stop5h 03mUnited Airlines
mié. 7/101:45 pmSTL - IDA
1 stop8h 23mUnited Airlines
Deal found 5/30$558
jue. 7/47:05 amIDA - STL
2 stops9h 07mUnited Airlines
mié. 7/101:45 pmSTL - IDA
1 stop8h 23mUnited Airlines
Deal found 5/30$563
vie. 6/285:58 pmIDA - STL
1 stop27h 22mUnited Airlines
vie. 7/55:30 pmSTL - IDA
2 stops20h 58mUnited Airlines
Deal found 5/29$566
vie. 6/285:58 pmIDA - STL
1 stop27h 22mUnited Airlines
vie. 7/54:36 pmSTL - IDA
1 stop17h 59mUnited Airlines
Deal found 5/29$571
mié. 8/75:59 pmIDA - STL
2 stops20h 41mUnited Airlines
vie. 8/95:30 pmSTL - IDA
2 stops24h 48mUnited Airlines
Deal found 5/29$600

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 2,784,634 searches. Prices were last updated on mayo 30, 2024.
vie. 6/285:58 pmIDA - STL
1 stop27h 22mUnited Airlines
vie. 7/55:30 pmSTL - IDA
2 stops20h 58mUnited Airlines
Deal found 5/29$566
vie. 6/285:58 pmIDA - STL
1 stop27h 22mUnited Airlines
vie. 7/54:36 pmSTL - IDA
1 stop17h 59mUnited Airlines
Deal found 5/29$571

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 2,784,634 searches. Data last updated mayo 30, 2024.
mié. 8/77:05 amIDA - STL
1 stop14h 06mUnited Airlines
vie. 8/95:30 pmSTL - IDA
2 stops24h 48mUnited Airlines
Deal found 5/30$540
mié. 8/77:05 amIDA - STL
1 stop14h 06mUnited Airlines
vie. 8/94:36 pmSTL - IDA
1 stop25h 42mUnited Airlines
Deal found 5/30$545
jue. 7/47:05 amIDA - STL
1 stop4h 44mUnited Airlines
mar. 7/91:45 pmSTL - IDA
1 stop8h 23mUnited Airlines
Deal found 5/30$552
jue. 7/47:05 amIDA - STL
2 stops7h 35mUnited Airlines
mar. 7/91:45 pmSTL - IDA
1 stop8h 23mUnited Airlines
Deal found 5/30$557
jue. 7/410:45 amIDA - STL
1 stop5h 03mUnited Airlines
mié. 7/101:45 pmSTL - IDA
1 stop8h 23mUnited Airlines
Deal found 5/30$558
jue. 7/47:05 amIDA - STL
2 stops9h 07mUnited Airlines
mié. 7/101:45 pmSTL - IDA
1 stop8h 23mUnited Airlines
Deal found 5/30$563
vie. 6/285:58 pmIDA - STL
1 stop27h 22mUnited Airlines
vie. 7/55:30 pmSTL - IDA
2 stops20h 58mUnited Airlines
Deal found 5/29$566
vie. 6/285:58 pmIDA - STL
1 stop27h 22mUnited Airlines
vie. 7/54:36 pmSTL - IDA
1 stop17h 59mUnited Airlines
Deal found 5/29$571
jue. 7/46:32 amIDA - STL
2 stops16h 18mAmerican Airlines
mar. 7/97:40 amSTL - IDA
2 stops14h 59mAmerican Airlines
Deal found 5/30$592

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 2,784,634 searches. Data last updated mayo 30, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$540 - $592

Route

Depart

Return

Price

Idaho Falls Fanning FieldLambert-St Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

mié. 8/7

1 stop14h 06m

Lambert-St Louis

vie. 8/9

2 stops24h 48m

$540

Idaho Falls Fanning FieldLambert-St Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

mié. 8/7

1 stop14h 06m

Lambert-St Louis

vie. 8/9

1 stop25h 42m

$545

Idaho Falls Fanning FieldLambert-St Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

jue. 7/4

1 stop4h 44m

Lambert-St Louis

mar. 7/9

1 stop8h 23m

$552

Idaho Falls Fanning FieldLambert-St Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

jue. 7/4

2 stops7h 35m

Lambert-St Louis

mar. 7/9

1 stop8h 23m

$557

Idaho Falls Fanning FieldLambert-St Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

jue. 7/4

1 stop5h 03m

Lambert-St Louis

mié. 7/10

1 stop8h 23m

$558

Idaho Falls Fanning FieldLambert-St Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

jue. 7/4

2 stops9h 07m

Lambert-St Louis

mié. 7/10

1 stop8h 23m

$563

Idaho Falls Fanning FieldLambert-St Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

vie. 6/28

1 stop27h 22m

Lambert-St Louis

vie. 7/5

2 stops20h 58m

$566

Idaho Falls Fanning FieldLambert-St Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

vie. 6/28

1 stop27h 22m

Lambert-St Louis

vie. 7/5

1 stop17h 59m

$571

Idaho Falls Fanning FieldLambert-St Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

jue. 7/4

2 stops16h 18m

Lambert-St Louis

mar. 7/9

2 stops14h 59m

$592

Flights are sorted by cheapest first

Deals found on 5/30

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.
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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 mayo 30, 2024.
United Airlines
7.4
Good
10,777 reviews
Check prices

Boarding

7.7

Crew

8.1

Food

6.7

Comfort

7.2

Entertainment

7.1

Overall

7.4

Reviews

1 / 10

Flight from shv was great. My connecting flight was canceled though. Had to stay overnight in airport

United Airlines
7.4
Good
10,777 reviews
United Airlines
7.4
Good
10,777 reviews
Check prices

Boarding

7.7

Crew

8.1

Food

6.7

Comfort

7.2

Entertainment

7.1

Overall

7.4

Reviews

1 / 10

Flight from shv was great. My connecting flight was canceled though. Had to stay overnight in airport

American Airlines
7.3
Good
14,284 reviews
United Airlines
7.4
Good
10,777 reviews
Check prices

Boarding

7.7

Crew

8.1

Food

6.7

Comfort

7.2

Entertainment

7.1

Overall

7.4

Reviews

1 / 10

Flight from shv was great. My connecting flight was canceled though. Had to stay overnight in airport

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 United Airlines for just $540, but on average you can expect to pay $589.

  • 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 $540. Another airline that can offer you cheap pricing is American Airlines. Users have found that United Airlines is 13% 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 5/30.

  • 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.

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 2,784,634 searches. Data last updated mayo 30, 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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