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Cheap flights from Idaho Falls to St. Louis from $304

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Idaho Falls to St. Louis departing on 1/18. 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 Idaho Falls to St. Louis

Cheap round-trip flights

These are some of the best round-trip flight deals from Idaho Falls to St. Louis 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 Idaho Falls to St. Louis.

Cheap last minute flights

Planning a quick getaway from Idaho Falls to St. Louis? 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 St. Louis, so you can enjoy a seamless trip without layovers.

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

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

All round-trip flight deals to St. Louis

The cheapest plane tickets to St. Louis found on KAYAK recently.
5:30 am - 1:42 pmIDA-STL
7h 12m1 stop
2:27 pm - 10:17 pmSTL-IDA
8h 50m1 stop
$304American Airlines
Find Deal
Sat, Jan 18 - Tue, Jan 21
2:28 pm - 8:43 pmIDA-STL
5h 15m1 stop
6:30 am - 3:18 pmSTL-IDA
9h 48m2 stops
$309United Airlines
Find Deal
Sat, Jan 18 - Tue, Jan 21
7:00 am - 3:38 pmIDA-STL
7h 38m2 stops
6:30 am - 3:18 pmSTL-IDA
9h 48m2 stops
$416United Airlines
Find Deal
Sat, Jan 18 - Tue, Jan 21
8:00 am - 6:37 pmIDA-STL
9h 37m1 stop
7:30 pm - 3:23 pmSTL-IDA
20h 53m1 stop
$536Alaska Airlines
Find Deal
Thu, Jun 5 - Sun, Jun 8
8:00 am - 8:16 pmIDA-STL
11h 16m2 stops
2:55 pm - 10:38 pmSTL-IDA
8h 43m1 stop
$725Alaska Airlines
Find Deal
Thu, Jun 5 - Sun, Jun 8
6:55 pm - 12:43 amIDA-STL
4h 48m1 stop
2:15 pm - 6:14 pmSTL-IDA
4h 59m1 stop
$842Delta
Find Deal
Mon, Apr 7 - Mon, Apr 14
5:57 pm - 2:18 pmIDA-STL
19h 21m2 stops
6:45 am - 9:28 amSTL-IDA
27h 43m2 stops
$880United Airlines
Find Deal
Thu, Jun 5 - Sun, Jun 8
6:55 pm - 12:43 amIDA-STL
4h 48m1 stop
3:30 pm - 10:14 pmSTL-IDA
7h 44m2 stops
$1,007Delta
Find Deal
Mon, Apr 7 - Mon, Apr 14
2:40 pm - 2:42 pmIDA-STL
23h 02m2 stops
10:40 am - 1:30 pmSTL-IDA
27h 50m2 stops
$1,308United Airlines
Find Deal
Mon, Apr 7 - Mon, Apr 14
IDA-STL
1171 mimulti-stop
Multiple Airlines
Find Deal

United Airlines flights from Idaho Falls to St. Louis

Our best United Airlines deals on Idaho Falls to St. Louis flight tickets
United Airlines
Jan 18
IDA2:28 pmIdaho Falls Fanning Field
5h 15m
1 stop
STL8:43 pmLambert-St Louis
Jan 21
STL6:30 amLambert-St Louis
9h 48m
2 stops
IDA3:18 pmIdaho Falls Fanning Field
United Airlines
Jan 18
IDA7:00 amIdaho Falls Fanning Field
7h 38m
2 stops
STL3:38 pmLambert-St Louis
Jan 21
STL6:30 amLambert-St Louis
9h 48m
2 stops
IDA3:18 pmIdaho Falls Fanning Field
United Airlines
Jun 5
IDA5:57 pmIdaho Falls Fanning Field
19h 21m
2 stops
STL2:18 pmLambert-St Louis
Jun 8
STL6:45 amLambert-St Louis
27h 43m
2 stops
IDA9:28 amIdaho Falls Fanning Field

Alaska Airlines flights from Idaho Falls to St. Louis

Our best Alaska Airlines deals on Idaho Falls to St. Louis flight tickets
Alaska Airlines
Jun 5
IDA8:00 amIdaho Falls Fanning Field
9h 37m
1 stop
STL6:37 pmLambert-St Louis
Jun 8
STL7:30 pmLambert-St Louis
20h 53m
1 stop
IDA3:23 pmIdaho Falls Fanning Field
Alaska Airlines
Jun 5
IDA8:00 amIdaho Falls Fanning Field
11h 16m
2 stops
STL8:16 pmLambert-St Louis
Jun 8
STL2:55 pmLambert-St Louis
8h 43m
1 stop
IDA10:38 pmIdaho Falls Fanning Field

See travel insights to St. Louis from

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

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 day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Thursday when prices can be found for as low as $631. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around $811. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from Idaho Falls in the evening is the least expensive time of day to depart. momondo users have found prices as low as $548 when looking at flights departing in the evening. In the afternoon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $704 per ticket.

When to book flights from Idaho Falls to St. Louis

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

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

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

Best Price Found

$304

Fastest flight time

4h 48m

Direct flights

None

Airports in St. Louis

1 airport
The best flight deal from Idaho Falls to St. Louis found on momondo in the last 72 hours is $304
The fastest flight from Idaho Falls to St. Louis takes 4h 48m
There are no direct flights from Idaho Falls to St. Louis. Popular non-direct route for this connection is Idaho Falls Fanning Field Airport - Lambert-St Louis Airport.
There is 1 airport near St. Louis: Lambert-St Louis (STL)

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

    Lambert-St Louis is 1181.2 mi away from Idaho Falls Fanning Field. Flights usually cover this in 4h 48m, depending on flying conditions and air traffic around both airports.

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

    Prices for flights from Idaho Falls Fanning Field Airport to Lambert-St Louis Airport are updated daily.

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

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Idaho Falls Fanning Field Airport to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The necessary travel and health documents for your Lambert-St Louis Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

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


Best airlines flying from Idaho Falls to St. Louis

Compare and see reviews for airlines that fly from Idaho Falls to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $497Free CancellationRating
8.0
8,580 reviews
Search Delta flights

Why use momondo?

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

Finding the right flight to St. Louis from Idaho Falls is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to St. Louis quick and easy, saving you time and money.

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

Yes. All flights to St. Louis from Idaho Falls on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

momondo helps you find the best flight between Idaho Falls and St. Louis by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Yes momondo offers price alerts on flights to St. Louis from Idaho Falls. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.


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