Cheap flights from St. Louis, MO to Idaho Falls, ID
Flights starting at £93. Choose between United Airlines, Alaska Airlines, or Frontier Airlines to find the best price.
Make your travel wishlist, we'll do the rest
Hidden deals
Kiwi-Code uncovers prices airlines don't want you to see.
Effortless booking
Use our flexible filters to tailor your search.
Travel hacking
Look out for the travel hack star icon for even cheaper fares.
Tips to know when travelling to Idaho Falls
Cheapest one-way trip | £94 |
---|---|
Cheapest round-trip | £335 |
Includes rare itinerary | |
Most popular airline | United Airlines |
Receive exclusive deals by email
By subscribing you agree to receive offers according to the conditions described in our Privacy Policy.
The most popular airlines for this route are United Airlines, Alaska Airlines, Frontier Airlines, Allegiant Air, and Spirit Airlines. St. Louis and Idaho Falls have 63 direct flights per week. When you arrive at Idaho Falls, consider visiting The Rocky Mountains, and Yellowstone National Park.
Check-in for a flight from St. Louis to Idaho Falls
Name | Carrier code | IATA Code | Passport needed during booking | Online check-in available |
---|---|---|---|---|
United Airlines | UAL | UA | Yes | No |
Alaska Airlines | ASA | AS | No | Opens 24 days before flight Closes 1 hours before flight |
Frontier Airlines | FFT | F9 | No | Opens 24 days before flight Closes 1 hours before flight |
Allegiant Air | AAY | G4 | No | Opens 24 days before flight Closes 1 hours before flight |
Spirit Airlines | NKS | NK | No | Opens 24 days before flight Closes 1 hours before flight |
Weather in Idaho Falls
Average Weather
Month | Average monthly max temperature | Average monthly min temperature |
January | -1°C | -10°C |
February | 0°C | -8°C |
March | 6°C | -3°C |
April | 12°C | 0°C |
May | 18°C | 4°C |
June | 24°C | 9°C |
July | 31°C | 13°C |
August | 29°C | 13°C |
September | 24°C | 9°C |
October | 14°C | 2°C |
November | 5°C | -3°C |
December | -1°C | -9°C |
14 day forecast
Frequently asked questions
Planning a trip? Thanks to our Virtual Interlining algorithm, we offer billions of route combinations between any A and any B in the world by plane, train, and bus. Find the cheapest routes and best deals for you, as well as the best dates on which to travel.
Explore alternative trips
Flights from St. Louis
- Flights from St. Louis to London
- Flights from St. Louis to Manchester
- Flights from St. Louis to Las Vegas
- Flights from St. Louis to Dublin
- Flights from St. Louis to San Jose
- Flights from St. Louis to Orlando
- Flights from St. Louis to Tampa
- Flights from St. Louis to San Francisco
- Flights from St. Louis to Washington, D.C.
- Flights from St. Louis to Glasgow
- Flights from St. Louis to Houston
- Flights from St. Louis to Minneapolis
- Flights from St. Louis to Detroit
- Flights from St. Louis to Los Angeles
- Flights from St. Louis to Raleigh
- Flights from St. Louis to Seattle
- Flights from St. Louis to Atlanta
- Flights from St. Louis to Guayaquil
- Flights from St. Louis to Edmonton
- Flights from St. Louis to Vilnius
Flights to Idaho Falls
- Flights from Los Angeles to Idaho Falls
- Flights from Amsterdam to Idaho Falls
- Flights from Thunder Bay to Idaho Falls
- Flights from New York to Idaho Falls
- Flights from Orlando to Idaho Falls
- Flights from Las Vegas to Idaho Falls
- Flights from Denver to Idaho Falls
- Flights from Chicago to Idaho Falls
- Flights from Miami to Idaho Falls
- Flights from Atlanta to Idaho Falls
- Flights from Mexico City to Idaho Falls
- Flights from Bogotá to Idaho Falls
- Flights from Dallas to Idaho Falls
- Flights from Phoenix to Idaho Falls
- Flights from Philadelphia to Idaho Falls
- Flights from San Francisco to Idaho Falls
- Flights from Cancún to Idaho Falls
- Flights from Houston to Idaho Falls
- Flights from San Juan to Idaho Falls
- Flights from Washington, D.C. to Idaho Falls
Popular routes
- Flights from Bangkok to Chiang Mai
- Flights from London to New York
- Flights from Lafayette to Chicago
- Flights from Seattle to Elmira
- Flights from Rapid City to Santa Ana
- Flights from Manaus to Ciudad Juárez
- Flights from Denpasar to Manzanillo
- Flights from Gaborone to Stockholm
- Flights from Leticia, Amazonas to Orlando
- Flights from Londrina to Las Vegas
- Flights from Gazipaşa to Mexico City
- Flights from Ibiza to San Salvador