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Cheap flights from St. Louis to Idaho Falls from $262

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Idaho Falls departing on 12/25. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from St. Louis to Idaho Falls

Cheap round-trip flights

These are some of the best round-trip flight deals from St. Louis to Idaho Falls that have been recently found on momondo from popular airlines, departing in the coming months.

Cheap one-way flights

Flying one-way? These are some of the best deals recently discovered on momondo for flights from St. Louis to Idaho Falls.

Cheap last minute flights

Planning a quick getaway from St. Louis to Idaho Falls? These are the last-minute flight deals available now.

Cheap direct flights

If you prefer a non-stop journey, check out our latest direct flight deals to Idaho Falls, so you can enjoy a seamless trip without layovers.

Cheap bus & train deals from St. Louis to Idaho Falls

Find recent round-trip train or bus tickets from St. Louis to Idaho Falls.

All round-trip flight deals to Idaho Falls

The cheapest plane tickets to Idaho Falls found on KAYAK recently.
2:27 pm - 10:17 pmSTL-IDA
8h 50m1 stop
5:30 am - 1:42 pmIDA-STL
7h 12m1 stop
$314American Airlines
Find Deal
sáb., ene. 11 - mié., ene. 15
2:27 pm - 10:17 pmSTL-IDA
8h 50m1 stop
12:55 pm - 7:30 pmIDA-STL
5h 35m1 stop
$334American Airlines
Find Deal
mié., ene. 8 - lun., ene. 13
5:45 am - 10:17 pmSTL-IDA
17h 32m2 stops
5:30 am - 1:42 pmIDA-STL
7h 12m1 stop
$388American Airlines
Find Deal
sáb., ene. 11 - mié., ene. 15
2:27 pm - 10:17 pmSTL-IDA
8h 50m1 stop
5:30 am - 10:09 pmIDA-STL
15h 39m2 stops
$398American Airlines
Find Deal
mié., ene. 8 - lun., ene. 13
8:00 am - 5:09 pmSTL-IDA
10h 09m2 stops
5:50 pm - 2:14 pmIDA-STL
19h 24m2 stops
$420United Airlines
Find Deal
mié., ene. 8 - lun., ene. 13
6:30 am - 3:20 pmSTL-IDA
9h 50m2 stops
5:50 pm - 2:14 pmIDA-STL
19h 24m2 stops
$440United Airlines
Find Deal
sáb., ene. 11 - mié., ene. 15
7:40 am - 12:23 pmSTL-IDA
5h 43m1 stop
6:55 pm - 12:57 amIDA-STL
5h 02m1 stop
$574Delta
Find Deal
jue., dic. 5 - lun., dic. 9
6:35 pm - 10:53 pmSTL-IDA
5h 18m1 stop
1:09 pm - 11:43 pmIDA-STL
9h 34m2 stops
$579Delta
Find Deal
jue., dic. 5 - lun., dic. 9
5:40 pm - 5:24 pmSTL-IDA
24h 44m2 stops
6:05 pm - 2:25 pmIDA-STL
19h 20m2 stops
$625United Airlines
Find Deal
jue., dic. 5 - lun., dic. 9
4:43 pm - 5:00 pmSTL-IDA
25h 17m1 stop
1:48 pm - 10:16 pmIDA-STL
7h 28m1 stop
$630United Airlines
Find Deal
sáb., dic. 21 - mié., ene. 1
7:00 am - 11:59 pmSTL-IDA
17h 59m1 stop
$262Alaska Airlines
Find Deal
mié., dic. 25
8:00 am - 5:00 pmSTL-IDA
10h 00m2 stops
$367United Airlines
Find Deal
mié., dic. 25

United Airlines flights from St. Louis to Idaho Falls

Our best United Airlines deals on St. Louis to Idaho Falls flight tickets
United Airlines
Jan 8
STL8:00 amLambert-St Louis
10h 09m
2 stops
IDA5:09 pmIdaho Falls Fanning Field
Jan 13
IDA5:50 pmIdaho Falls Fanning Field
19h 24m
2 stops
STL2:14 pmLambert-St Louis
United Airlines
Jan 11
STL6:30 amLambert-St Louis
9h 50m
2 stops
IDA3:20 pmIdaho Falls Fanning Field
Jan 15
IDA5:50 pmIdaho Falls Fanning Field
19h 24m
2 stops
STL2:14 pmLambert-St Louis
United Airlines
Dec 5
STL5:40 pmLambert-St Louis
24h 44m
2 stops
IDA5:24 pmIdaho Falls Fanning Field
Dec 9
IDA6:05 pmIdaho Falls Fanning Field
19h 20m
2 stops
STL2:25 pmLambert-St Louis

American Airlines flights from St. Louis to Idaho Falls

Our best American Airlines deals on St. Louis to Idaho Falls flight tickets
American Airlines
Jan 11
STL2:27 pmLambert-St Louis
8h 50m
1 stop
IDA10:17 pmIdaho Falls Fanning Field
Jan 15
IDA5:30 amIdaho Falls Fanning Field
7h 12m
1 stop
STL1:42 pmLambert-St Louis
American Airlines
Jan 8
STL2:27 pmLambert-St Louis
8h 50m
1 stop
IDA10:17 pmIdaho Falls Fanning Field
Jan 13
IDA12:55 pmIdaho Falls Fanning Field
5h 35m
1 stop
STL7:30 pmLambert-St Louis
American Airlines
Jan 11
STL5:45 amLambert-St Louis
17h 32m
2 stops
IDA10:17 pmIdaho Falls Fanning Field
Jan 15
IDA5:30 amIdaho Falls Fanning Field
7h 12m
1 stop
STL1:42 pmLambert-St Louis

See travel insights to Idaho Falls from

How to get the cheapest flight ticket from St. Louis to Idaho Falls

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Idaho Falls?

If you aren’t able to travel to Idaho Falls during the month of February, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $477.

What is the cheapest day to depart on your flight to Idaho Falls?

Our data shows that Tuesday is the least expensive day to fly to Idaho Falls. Tickets to fly out on this day can be as low as $591. Be sure to avoid booking your departure on a Monday as prices are generally higher than usual. According to our data, the average ticket price to Idaho Falls on Monday is $778.

What is the cheapest time of day to depart on your flight to Idaho Falls?

Our most recent data shows that the best time of day to fly to Idaho Falls is in the evening. Flights from St. Louis to Idaho Falls during this time can be as low as $0. Try not to purchase tickets in the afternoon because they tend to be around $685. Of course, these prices can vary depending on the time of year and what airport you fly to.

When to book flights from St. Louis to Idaho Falls

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Idaho Falls according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Idaho Falls (STL to IDA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Idaho Falls

Best Price Found

$262

Fastest flight time

5h 18m

Direct flights

None

Airports in Idaho Falls

1 airport
The best one-way flight to Idaho Falls from St. Louis in the past 72 hours is $262. The best round-trip flight deal from St. Louis to Idaho Falls found on momondo in the last 72 hours is $314.
The fastest flight from St. Louis to Idaho Falls takes 5h 18m
There are no direct flights from St. Louis to Idaho Falls. Popular non-direct route for this connection is Lambert-St Louis Airport - Idaho Falls Fanning Field Airport.
There is 1 airport near Idaho Falls: Idaho Falls Fanning Field (IDA)

  • How far is Lambert-St Louis to Idaho Falls Fanning Field by plane?

    The straight-line distance from Lambert-St Louis to Idaho Falls Fanning Field is 1181.2 mi. 5h 18m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Idaho Falls Fanning Field Airport?

    Prices for flights from Lambert-St Louis Airport to Idaho Falls Fanning Field Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Idaho Falls Fanning Field Airport?

  • How old do you have to be to fly from Lambert-St Louis Airport to Idaho Falls Fanning Field Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Idaho Falls Fanning Field Airport.

  • What documentation or ID do you need to fly to Idaho Falls Fanning Field Airport?

    The travel and health documents required for your trip to Idaho Falls Fanning Field Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Idaho Falls Fanning Field Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from St. Louis to Idaho Falls?


Best airlines flying from St. Louis to Idaho Falls

Compare and see reviews for airlines that fly from St. Louis to Idaho Falls with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $314Free CancellationRating
8.0
8,755 reviews
Search Delta flights
American AirlinesPriceFrom $388Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $413Free CancellationRating
7.4
9,172 reviews
Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Idaho Falls?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from St. Louis to Idaho Falls. momondo saves you time and could save you money on your trip.

Can I find flights from St. Louis to Idaho Falls with flexible booking policies on momondo?

momondo does allow users to show only those flights to Idaho Falls from St. Louis which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from St. Louis to Idaho Falls?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from St. Louis to Idaho Falls.

I’m not ready to book a flight from St. Louis to Idaho Falls right now. Can momondo alert me if prices change?

Yes. momondo can track prices for St. Louis to Idaho Falls flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.


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