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

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How to find the cheapest flight from
Idaho Falls (IDA) to St. Louis (STL)

All the information you need to plan the best IDA to STL flight in 2022: compare Idaho Falls to St. Louis flight prices with the expected peak season, weather and rainfall in St. Louis.
What is the cheapest day to fly round-trip from Idaho Falls to St. Louis?

Tuesday 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.

When is the cheapest time to fly from Idaho Falls to St. Louis (IDA - STL)?

Unlike in the morning, when flights are generally more expensive, you can save up to 45% on flights from Idaho Falls to St. Louis by exploring options for tickets at noon.

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 $456 for the month, but tickets can be as low as $184. Due to multiple factors, prepare for potentially higher prices in May.

Cheap flights from Idaho Falls to St. Louis in June, July 2022

The best prices found for IDA to STL flights for June, July
25 Jul - 27 Jul
$305pp
IDA
Idaho Falls Fanning Field
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Multiple Airlines
   
2 STOPS
IDA
Idaho Falls Fanning Field
25 Jul - 27 Jul
$434pp
IDA
Idaho Falls Fanning Field
Multiple Airlines
   
2 STOPS
STL
Lambert-St Louis
STL
Lambert-St Louis
Multiple Airlines
   
2 STOPS
IDA
Idaho Falls Fanning Field
25 Jul - 27 Jul
$583pp
IDA
Idaho Falls Fanning Field
Multiple Airlines
   
2 STOPS
STL
Lambert-St Louis
STL
Lambert-St Louis
Multiple Airlines
     
3 STOPS
IDA
Idaho Falls Fanning Field

Idaho Falls Fanning Field to St. Louis 2022 flight deals

Cheap flights to St. Louis from Idaho Falls found for this year
25 Jul - 27 Jul
$305pp
IDA
Idaho Falls Fanning Field
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Multiple Airlines
   
2 STOPS
IDA
Idaho Falls Fanning Field
25 Jul - 27 Jul
$434pp
IDA
Idaho Falls Fanning Field
Multiple Airlines
   
2 STOPS
STL
Lambert-St Louis
STL
Lambert-St Louis
Multiple Airlines
   
2 STOPS
IDA
Idaho Falls Fanning Field
3 Aug - 9 Aug
$506pp
IDA
Idaho Falls Fanning Field
Multiple Airlines
   
2 STOPS
STL
Lambert-St Louis
STL
Lambert-St Louis
Multiple Airlines
   
2 STOPS
IDA
Idaho Falls Fanning Field

One-way flights to Lambert-St Louis from Idaho Falls

The cheapest one-way flights from Idaho Falls to St. Louis
3:15 am - 4:41 pm
American Airlines
2 Stops
12h 26m
IDA - STL
American Airlines
2:03 pm - 10:14 am
United Airlines
2 Stops
19h 11m
IDA - STL
United Airlines
$512
United
12:20 pm - 12:33 pm
Multiple Airlines
3 Stops
23h 13m
IDA - STL
Multiple Airlines
$680
Kiwi.com

Related info for your journey

Useful info, stats and facts about <span class="emphasized">Idaho Falls</span> to <span class="emphasized">St. Louis</span> flights.

Flight FAQs

From Idaho Falls to St. Louis

Which airlines flying from Idaho Falls Fanning Field to Lambert-St Louis have flexible cancellations due to COVID-19?

United Airlines and Delta are some of the carriers that may have flexible cancellation policies. You can use our site to filter for other airlines that may also have this kind of flexibility.

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 Multiple Airlines for just $506, but on average you can expect to pay $695.

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 $524. Other airlines that can offer you cheap pricing are United Airlines, from $882, and Alaska Airlines, from $1,093.

What are the cheapest flights from Idaho Falls to St. Louis?

Looking for the cheapest flight from Idaho Falls to St. Louis? While on average our users pay $617, our data indicates the cheapest price to be $379. The most popular route (Idaho Falls Fanning Field - Lambert-St Louis), is priced around $506.

What are the most popular airlines that fly from Idaho Falls to St. Louis?

American Airlines, Delta and United Airlines are the most popular airlines when flying from Idaho Falls to St. Louis.

COVID Restrictions

View COVID Travel Restrictions for St. Louis, MO

Do I need a COVID test to fly to St. Louis from Idaho Falls?

Information is based on travel restrictions for travel to Lambert-St Louis within the United States

Most visitors from Idaho Falls Fanning Field need to provide a negative COVID-19 test result and/or quarantine to enter Lambert-St Louis.

COVID-19 testing requirements
Visitors from Idaho Falls Fanning Field are not required to present a negative COVID-19 PCR test or antigen result upon entering Lambert-St Louis.

Quarantine requirements
Visitors from Idaho Falls Fanning Field are not required to quarantine after entering Lambert-St Louis.

Do I need a test to fly back to Idaho Falls from St. Louis?

Returning to Idaho Falls Fanning Field from Lambert-St Louis

COVID-19 testing requirements
Visitors from Lambert-St Louis are not required to present a negative COVID-19 PCR test or antigen result upon entering Idaho Falls Fanning Field.

Quarantine requirements
Visitors from Lambert-St Louis are not required to quarantine after entering Idaho Falls Fanning Field.

Hide COVID Travel Restrictions for St. Louis, MO

Alternative routes for Idaho Falls to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.

Destination information for St. Louis

Things to know before you go - useful duration and weather info for your trip from Idaho Falls to St. Louis.
Average temperature for June in St. Louis
86.0 °F
Avg rainfall for June in St. Louis
4.1 ″

Airports servicing Idaho Falls

Airports servicing St. Louis

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