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Cheap flights from St. Louis to Idaho Falls from $190

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 8/13. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from St. Louis to Idaho Falls

Cheap round-trip flights

Alaska Airlines Logo
3:35 pm - 10:39 pmSTL-IDA
8h 04m1 stop
Alaska Airlines Logo
6:13 am - 2:39 pmIDA-STL
7h 26m1 stop
$367Alaska Airlines
Find Deal
sáb., sep. 27 - mié., oct. 1
Delta Logo
7:10 am - 6:11 pmSTL-IDA
12h 01m2 stops
Delta Logo
6:00 am - 1:33 pmIDA-STL
6h 33m1 stop
$373Delta
Find Deal
sáb., sep. 27 - mié., oct. 1
Delta Logo
12:15 pm - 6:11 pmSTL-IDA
6h 56m2 stops
Delta Logo
6:51 pm - 12:38 amIDA-STL
4h 47m1 stop
$383Delta
Find Deal
sáb., sep. 27 - mié., oct. 1
Delta Logo
1:26 pm - 10:25 pmSTL-IDA
9h 59m2 stops
Delta Logo
6:00 am - 4:45 pmIDA-STL
9h 45m2 stops
$388Delta
Find Deal
sáb., sep. 27 - mié., oct. 1
Delta Logo
7:45 am - 2:24 pmSTL-IDA
7h 39m1 stop
Delta Logo
6:52 pm - 12:38 amIDA-STL
4h 46m1 stop
$408Delta
Find Deal
mar., jul. 29 - mar., ago. 5
Delta Logo
10:15 am - 6:11 pmSTL-IDA
8h 56m2 stops
Delta Logo
1:06 pm - 11:09 pmIDA-STL
9h 03m2 stops
$431Delta
Find Deal
sáb., sep. 27 - mié., oct. 1
United Airlines Logo
9:13 am - 1:33 pmSTL-IDA
5h 20m1 stop
United Airlines Logo
2:35 pm - 8:59 pmIDA-STL
5h 24m1 stop
$465United Airlines
Find Deal
mié., dic. 24 - mié., dic. 31
United Airlines Logo
5:00 am - 1:33 pmSTL-IDA
9h 33m2 stops
United Airlines Logo
2:35 pm - 8:59 pmIDA-STL
5h 24m1 stop
$506United Airlines
Find Deal
mié., dic. 24 - mié., dic. 31
United Airlines Logo
6:45 am - 1:33 pmSTL-IDA
7h 48m2 stops
United Airlines Logo
7:00 am - 7:25 pmIDA-STL
11h 25m2 stops
$547United Airlines
Find Deal
mié., dic. 24 - mié., dic. 31
United Airlines Logo
4:45 pm - 8:59 pmSTL-IDA
5h 14m1 stop
United Airlines Logo
6:03 pm - 11:59 pmIDA-STL
4h 56m1 stop
$640United Airlines
Find Deal
mar., jul. 29 - sáb., ago. 2

United Airlines flights from St. Louis to Idaho Falls

Our best United Airlines deals on St. Louis to Idaho Falls flight tickets
United Airlines
Dec 24
STL9:13 amLambert-St Louis
5h 20m
1 stop
IDA1:33 pmIdaho Falls Fanning Field
Dec 31
IDA2:35 pmIdaho Falls Fanning Field
5h 24m
1 stop
STL8:59 pmLambert-St Louis
$465
Find similar
United Airlines
Dec 24
STL5:00 amLambert-St Louis
9h 33m
2 stops
IDA1:33 pmIdaho Falls Fanning Field
Dec 31
IDA2:35 pmIdaho Falls Fanning Field
5h 24m
1 stop
STL8:59 pmLambert-St Louis
$506
Find similar
United Airlines
Dec 24
STL6:45 amLambert-St Louis
7h 48m
2 stops
IDA1:33 pmIdaho Falls Fanning Field
Dec 31
IDA7:00 amIdaho Falls Fanning Field
11h 25m
2 stops
STL7:25 pmLambert-St Louis
$547
Find similar

Delta flights from St. Louis to Idaho Falls

Our best Delta deals on St. Louis to Idaho Falls flight tickets
Delta
Sep 27
STL7:10 amLambert-St Louis
12h 01m
2 stops
IDA6:11 pmIdaho Falls Fanning Field
Oct 1
IDA6:00 amIdaho Falls Fanning Field
6h 33m
1 stop
STL1:33 pmLambert-St Louis
$373
Find similar
Delta
Sep 27
STL12:15 pmLambert-St Louis
6h 56m
2 stops
IDA6:11 pmIdaho Falls Fanning Field
Oct 1
IDA6:51 pmIdaho Falls Fanning Field
4h 47m
1 stop
STL12:38 amLambert-St Louis
$383
Find similar
Delta
Sep 27
STL1:26 pmLambert-St Louis
9h 59m
2 stops
IDA10:25 pmIdaho Falls Fanning Field
Oct 1
IDA6:00 amIdaho Falls Fanning Field
9h 45m
2 stops
STL4:45 pmLambert-St Louis
$388
Find similar

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 typical price of a round-trip flight between St. Louis and Idaho Falls?

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 $605. 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 $787.

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 at noon. Flights from St. Louis to Idaho Falls during this time can be as low as $651. 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

$190

Fastest flight time

4h 48m

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 $190. The best round-trip flight deal from St. Louis to Idaho Falls found on momondo in the last 72 hours is $367.
The fastest flight from St. Louis to Idaho Falls takes 4h 48m
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)
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  • 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. 4h 48m 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 $192Free CancellationRating
8.0
7,959 reviews
Search Delta flights
American AirlinesPriceFrom $305Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $400Free CancellationRating
7.4
8,863 reviews
Search United Airlines flights

Traveling to a place near Idaho Falls?

Book flights to Idaho Falls if you plan to visit one of these locations
Rexburg

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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