IDA - STL

$574 Find Cheap Flights from Idaho Falls to St. Louis

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Idaho Falls to St. Louis departing on 12/5. 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.
1 adult
0 bags

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These are the airlines KAYAK users have selected most often from within our search results in flight searches from Idaho Falls to St. Louis, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Idaho Falls to St. Louis, as well as popular online travel agencies
In the last 7 days travelers have searched 46,646,933 times on KAYAK, and here is why:

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Cheap Flight Deals from Idaho Falls to St. Louis (IDA-STL)

 
These are the cheapest deals for flights from Idaho Falls to St. Louis currently on KAYAK along with options from the most popular airlines KAYAK users selected for this route. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip flight deals from Idaho Falls to St. Louis

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from Idaho Falls to St. Louis.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
6:10 am - 1:30 pmIDA-STL
6h 20m1 stop
6:30 pm - 10:55 pmSTL-IDA
5h 25m1 stop
$574Delta
Find Deal
Thu, Dec 5 - Mon, Dec 9
1:05 pm - 9:24 pmIDA-STL
7h 19m1 stop
3:26 pm - 10:55 pmSTL-IDA
8h 29m2 stops
$579Delta
Find Deal
Thu, Dec 5 - Mon, Dec 9
6:05 pm - 12:19 pmIDA-STL
17h 14m2 stops
5:40 pm - 9:14 pmSTL-IDA
28h 34m2 stops
$635United Airlines
Find Deal
Thu, Dec 5 - Mon, Dec 9

Flights from Idaho Falls to St. Louis - Travel Insights & Trends

Get data-powered insights and trends into flights from Idaho Falls to St. Louis to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Idaho Falls to St. Louis?

The average price of all flights from Idaho Falls to St. Louis clicked on KAYAK for each day over the last 12 months.
For Idaho Falls to St. Louis, Tuesday is the cheapest day to fly on average and Monday is the most expensive. Flying from St. Louis back to Idaho Falls, the best deals are generally found on Tuesday, with Monday being the most expensive.

Good to know

Cheapest flight

$574
Flight from Idaho Falls to St. Louis

When to book flights from Idaho Falls to St. Louis

Are your dates flexible? Find out the best times to travel from Idaho Falls to St. Louis based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Idaho Falls to St. Louis

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

    In the last 3 days, the lowest price for a flight from Idaho Falls to St. Louis was $574 for a round-trip ticket.

  • Do I need a passport to fly between Idaho Falls and St. Louis?

    No, a passport isn't needed to fly from Idaho Falls to St. Louis. However, local authorities might ask for an official ID.

  • Which aircraft models fly most regularly from Idaho Falls to St. Louis?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Idaho Falls to St. Louis?

    SkyTeam, and Star Alliance are the airline alliances operating flights between Idaho Falls and St. Louis, with SkyTeam being the most commonly used for this route.

  • How does KAYAK find such low prices on flights from Idaho Falls to St. Louis?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Idaho Falls to St. Louis.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Idaho Falls to St. Louis?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Idaho Falls is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Idaho Falls to St. Louis?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to St. Louis with an airline and back to Idaho Falls with another airline. Booking your flights between Idaho Falls and STL can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Idaho Falls to St. Louis?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Louis from Idaho Falls up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top airline flying from Idaho Falls to St. Louis

 
See real verified KAYAK customer reviews for airlines flying from Idaho Falls to St. Louis. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Idaho Falls to St. Louis? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
DeltaOverall score based on 8755 reviews
7.3Food
7.9Entertainment
7.9Comfort
8.2Boarding
8.5Crew
Airline reviews

I sat in comfort plus. It was fine. Seats were comfortable. I got drinks and snacks.

8.0 ExcellentAndrew, Nov 2024MCO - LGA
Read more Delta reviews

I sat in comfort plus. It was fine. Seats were comfortable. I got drinks and snacks.

Crew was nice. Flight was timely. Seats could be better as well as the food considering it’s first class.

Left on time and arrived early this extending our 31 minute transfer. Bags made it also!

Good and consistent Printer in lounge did not work for me :(

Most of my discomfort was going through TSA. However, the Delta seats had inadequate leg room and I tried my very best to connect to the wi-fi and it was a cumbersome process that finally gave me the info that I needed to sign in AFTER I had completed the flight...Why make it so difficult to use? That said I really really appreciate the pilot taking a little extra time to avoid a bad storm area and both landings in Atlanta and Orlando were flawless to my delight!!!

Delayed in taking off because no flight crew. The in seat entertainment was working properly.

I upgraded to first class only to find out that I still had no access to the sky lounge without a sky miles card or AmEx (something that should be emphasized outside of the fine print!) Also, no food or drink service provided during the flight, so I basically paid 4x more just for “free” checked baggage and a bigger seat. Not worth it.

Delta was really good about being transparent with why we were delayed it’s just that’s the plane was really old and outdated and a lot of the comfort and amenities we know Delta to have did not shine through

Bottom seat cushion is almost non existent. Very uncomfortable seat.

Delta was great the entertainment was outdated. Screen was very small and didn’t work.

Book cheap flights from Idaho Falls to St. Louis

One-way flight deals

multi-stopMultiple Airlines
1171 miIDA-STL

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Last minute flights from Idaho Falls to St. Louis

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Idaho Falls to St. Louis that are departing in the next 10 days.
11/22Fri
multi-stop
38h 52mIDA-STL
11/24Sun
multi-stop
18h 32mSTL-IDA
$762
11/23Sat
multi-stopAmerican Airlines
6h 04mIDA-STL
11/27Wed
multi-stopAmerican Airlines
8h 51mSTL-IDA
$784
11/23Sat
multi-stopUnited Airlines
11h 33mIDA-STL
11/27Wed
multi-stopUnited Airlines
5h 39mSTL-IDA
$789
11/23Sat
multi-stopUnited Airlines
9h 15mIDA-STL
11/27Wed
multi-stopUnited Airlines
9h 09mSTL-IDA
$794
11/22Fri
multi-stopDelta
4h 38mIDA-STL
11/24Sun
multi-stopDelta
5h 18mSTL-IDA
$834
11/22Fri
multi-stopDelta
9h 36mIDA-STL
11/24Sun
multi-stopDelta
4h 59mSTL-IDA
$839
11/22Fri
multi-stopDelta
9h 36mIDA-STL
11/24Sun
multi-stopDelta
9h 10mSTL-IDA
$844
11/26Tue
multi-stopDelta
4h 38mIDA-STL
11/30Sat
multi-stopDelta
5h 18mSTL-IDA
$1,006
11/26Tue
multi-stopDelta
4h 38mIDA-STL
11/30Sat
multi-stopDelta
5h 28mSTL-IDA
$1,076
11/26Tue
multi-stopUnited Airlines
9h 02mIDA-STL
11/30Sat
multi-stopUnited Airlines
13h 12mSTL-IDA
$1,085

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Everything you need to know for your flight from Idaho Falls to St. Louis

Information on your arrival and departure airports

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