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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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  • 6 13
  • 13 20
  • 20 27

  • May

    27 4
  • 4 11
  • 11 18
  • 18 25

  • Jun

    25 1
  • 1 8
  • 8 15
  • 15 22
  • 22 29
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 departure date and time of your selection. By analyzing data from all airlines, we've discovered that 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 PHP 37,681.

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
Book Early
Once prices are gone, they're gone. Lock in deals while you can!
2
Compare Flight Prices
Compare prices on travel agency and airline websites.
3
Look Out for Deals
Check airline and travel agency websites for latest flight deals
4
Check One-way Fares
Buying two cheap one-way flights can sometimes be a better deal than a round-trip.
5
Try Different Dates
Flying during the week, early in the morning, or late at night can help save money.
6
Use the Trip.com App
Save up to £10 per person when booking your flights on Trip.com

Flight Info | St. Louis to Idaho Falls

Cheapest one-way flight price PHP 9,189
Off-season for travel February
Peak season for travel May
Flight distance 1,907.67 km
Popular airline Alaska Airlines

More Travel Options

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  • Popular Airlines to Idaho Falls
  • Popular Flights From St. Louis
  • Popular Idaho Falls Hotels