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Flights from St. Louis to Idaho Falls

Cheap flight deals from St. Louis to Idaho Falls

We've found these cheap flights for you. You can book one-way or round-trip flight tickets.

  • Round-trip
  • One way

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

When is the cheapest time to fly from St. Louis to Idaho Falls?

We monitor flight fares to help you find the best deals effortlessly

Cheapest flights
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  • Apr

    30 6
  • 6 13
  • 13 20
  • 20 27

  • May

    27 4
  • 4 11
  • 11 18
  • 18 25

  • Jun

    25 1
  • 1 8
  • 8 15
  • 15 22
Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

Frequently Asked Questions

  • When are flight tickets from St. Louis (STL) to Idaho Falls (IDA) the cheapest?

    Airlines adjust prices for flights from St. Louis to Idaho Falls based on the date and time of your booking. By analyzing data from all airlines, on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.

  • How much do flights from St. Louis (STL) to Idaho Falls (IDA) cost?

    According to Trip.com's data, the lowest price is around AED 2,426.

  • What is the transportation method from the main airport to downtown in Idaho Falls?

    • The distance from Idaho Falls Regional Airport to downtown is about 3 km, by taxi about 20 minutes.

  • How many airports are there in Idaho Falls (IDA)?

    There are 1 airport(s) near Idaho Falls (IDA): Idaho Falls Regional Airport.

How to find a cheap flight from St. Louis to Idaho Falls

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from St. Louis to Idaho Falls. Book your flights at the right time and save more.
1
Being flexible with your dates to get the cheapest St. Louis to Idaho Falls ticket.
Tap "Date" on flight search bar to scan through the calender for St. Louis to Idaho Falls airfare over next 6 months in 2025. If you would like to fly in next 3 months, it seems the cheapest date is on Sat, Apr 26 at AED 592 for one-way flights.
2
Compare cheap St. Louis to Idaho Falls flight deals from over hundreds of airlines.
Our extensive search allows you to compare prices from over 500 airlines to choose the cheapest flight tickets from St. Louis to Idaho Falls. The cheapest airline operating is Delta Air Lines.
3
Set up a Price Alert
By setting up a Price Alert for your St. Louis to Idaho Falls route, you can easily track the price of your airline tickets from without manually checking every day.
4
Don't miss cheap St. Louis to Idaho Falls flight deals and promo codes.
You can always get the latest deals through Trip.com Deals and Promo Codes for cheap flights. If registering a free membership, you can receive more deals for your flights.
5
Book early or wait unitl the last minute.
It's always better to book early. Flight tickets tend to be the cheapest when they are first released, normally about a year before the departure date. So, check online as soon as the flights you want become available. If you miss the cheapest time, you can still find lower-priced tickets as the flight date approaches.
6
Search for flights on the go.
To get the best flight booking experience on the go, download Trip.com and search for cheap flight tickets from St. Louis to Idaho Falls to get exclusive deals for you.

Flight Info | St. Louis to Idaho Falls

Cheapest one-way flight price AED 591
Off-season for travel February
Peak season for travel May
Flight distance 1,907.67 km
Popular airline Alaska Airlines

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