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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)

What is the cheapest day to fly round-trip from Idaho Falls to St Louis?

Sunday flights are generally found to be more expensive for flights 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.

How far in advance should I book a flight from Idaho Falls to St Louis?

To save up to 96% on this flight, we recommend booking at least 31 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Idaho Falls to St Louis from $374 1-2 weeks out and tickets from $553 for flights departing within the next 72 hours.

What is the cheapest month to fly from Idaho Falls to St Louis?

Our data shows that August tends to be the cheapest month to fly to St Louis from Idaho Falls. Users have commonly found prices around $266 for the month, but tickets can be as low as $158. Due to multiple factors, prepare for potentially higher prices in December.

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 8% on flights from Idaho Falls to St Louis by exploring options for tickets at noon.

Cheap flights from Idaho Falls to St Louis in December, January 2021

The best prices found for IDA to STL flights for December, January
19 Dec - 29 Dec
$459pp
IDA
Idaho Falls Fanning Field
United Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
United Airlines
   
2 STOPS
IDA
Idaho Falls Fanning Field
19 Dec - 29 Dec
$461pp
IDA
Idaho Falls Fanning Field
United Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
United Airlines
 
1 STOP
IDA
Idaho Falls Fanning Field
19 Dec - 29 Dec
$557pp
IDA
Idaho Falls Fanning Field
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Multiple Airlines
     
3 STOPS
IDA
Idaho Falls Fanning Field

Idaho Falls to St Louis 2021 flight deals

Cheap flights to St Louis from Idaho Falls found for this year
19 Dec - 29 Dec
$459pp
IDA
Idaho Falls Fanning Field
United Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
United Airlines
   
2 STOPS
IDA
Idaho Falls Fanning Field
19 Dec - 29 Dec
$461pp
IDA
Idaho Falls Fanning Field
United Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
United Airlines
 
1 STOP
IDA
Idaho Falls Fanning Field
19 Dec - 29 Dec
$557pp
IDA
Idaho Falls Fanning Field
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Multiple Airlines
     
3 STOPS
IDA
Idaho Falls Fanning Field

One-way flights to St Louis from Idaho Falls

The cheapest one-way flights from Idaho Falls to St Louis
1:40 am - 8:21 am
Delta
1 Stop
5h 41m
IDA - STL
Delta
$223
Delta
12:50 pm - 7:58 am
Multiple Airlines
2 Stops
42h 08m
IDA - STL
Multiple Airlines
$128
Kiwi.com
12:55 pm - 3:00 pm
Multiple Airlines
3 Stops
49h 05m
IDA - STL
Multiple Airlines
$170
Kiwi.com

Related info for your journey

Useful info, stats and facts about Idaho Falls to St Louis flights.

Flight FAQs

From Idaho Falls to St Louis

Are flight prices decreasing from Idaho Falls to St Louis due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both Idaho Falls and St Louis for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

What safety measures are being taken by airlines flying from Idaho Falls Fanning Field to Lambert-St Louis to control the spread of COVID-19?

Delta is one of the many airlines that have implemented additional safety measures to control the spread of COVID-19. New policies for travelers booking flights from Idaho Falls Fanning Field to Lambert-St Louis include masks being provided and required on board, daily cleaning and sanitization, use of HEPA filters, pre-flight testing for antibodies and symptoms, and socially distanced seating (for a limited time). Keep in mind that policies will vary by airline.

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

Delta and United Airlines 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 $300 on Cheapflights?

Yes, there are multiple flights from Idaho Falls to St Louis for under $300. The cheapest flight booked recently is on United Airlines for just $226, but on average you can expect to pay $433.

Are there nonstop flights from Idaho Falls to St Louis for under $200 on Cheapflights?

There are no nonstop flights from Idaho Falls to St Louis, but Cheapflights can provide you with all the information you need to find the fastest route with the fewest stops.

Does it rain more in Idaho Falls or St Louis?

The rainfall in Idaho Falls is generally more than the rainfall in St Louis. This will continue over the next 13 days.

Is Idaho Falls weather warmer or cooler than St Louis?

Expect the weather to be around 91 °F on average in July. As the temperature peaks, try to get your plans done early, as flight price and availability will have an impact on your travels. The climate in St Louis is generally colder than in Idaho Falls.

How long is the flight from Idaho Falls to St Louis?

Departing from Idaho Falls to St Louis will take you 4h 36m. This flight may include one or multiple stops.

What are the cheapest airlines flying from Idaho Falls to St Louis round-trip?

United Airlines, at $226, was found to be the cheapest airline from Idaho Falls to St Louis. An alternate airline flying to your destination would be Delta.

What are the cheapest airlines to fly from Idaho Falls to St Louis one-way?

To fly one-way, consider booking your trip with Delta, which is currently one of the cheapest options available, starting at $223.

Alternative routes for Idaho Falls to St Louis

Destination information for St Louis

Things to know before you go. Useful info for your trip from Idaho Falls to St Louis
Average temperature for December in St Louis
46.4 °F
Avg rainfall for December in St Louis
2.5 ″

Airports servicing Idaho Falls

Airports servicing St. Louis

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