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Cheap flights from Idaho Falls to St. Louis from $175

This is the cheapest one-way 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 9/24. 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

American Airlines Logo
12:54 pm - 9:53 pmIDA-STL
7h 59m1 stop
American Airlines Logo
6:05 am - 12:09 pmSTL-IDA
7h 04m1 stop
$351American Airlines
Find Deal
Wed, Sep 24 - Sun, Sep 28
Hawaiian Airlines Logo
6:13 am - 2:39 pmIDA-STL
7h 26m1 stop
Hawaiian Airlines Logo
3:35 pm - 10:39 pmSTL-IDA
8h 04m1 stop
$366Hawaiian Airlines
Find Deal
Sun, Aug 31 - Fri, Sep 5
Hawaiian Airlines Logo
6:13 am - 2:39 pmIDA-STL
7h 26m1 stop
Hawaiian Airlines Logo
3:57 pm - 10:38 pmSTL-IDA
7h 41m1 stop
$367Hawaiian Airlines
Find Deal
Tue, Sep 30 - Sat, Oct 4
Delta Logo
6:00 am - 1:33 pmIDA-STL
6h 33m1 stop
Delta Logo
6:00 am - 12:26 pmSTL-IDA
7h 26m2 stops
$373Delta
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Tue, Sep 30 - Sat, Oct 4
Delta Logo
6:51 pm - 8:14 amIDA-STL
12h 23m2 stops
Delta Logo
6:00 am - 12:26 pmSTL-IDA
7h 26m2 stops
$378Delta
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Tue, Sep 30 - Sat, Oct 4
American Airlines Logo
6:44 am - 9:53 pmIDA-STL
14h 09m2 stops
American Airlines Logo
6:05 am - 12:09 pmSTL-IDA
7h 04m1 stop
$386American Airlines
Find Deal
Wed, Sep 24 - Sun, Sep 28
United Airlines Logo
2:35 pm - 8:59 pmIDA-STL
5h 24m1 stop
United Airlines Logo
9:13 am - 1:33 pmSTL-IDA
5h 20m1 stop
$401United Airlines
Find Deal
Mon, Dec 22 - Wed, Jan 7
United Airlines Logo
2:35 pm - 8:59 pmIDA-STL
5h 24m1 stop
United Airlines Logo
10:30 am - 5:22 pmSTL-IDA
7h 52m2 stops
$406United Airlines
Find Deal
Mon, Dec 22 - Wed, Jan 7
Delta Logo
6:51 pm - 8:14 amIDA-STL
12h 23m2 stops
Delta Logo
6:00 am - 12:26 pmSTL-IDA
7h 26m2 stops
$414Delta
Find Deal
Wed, Sep 24 - Sun, Sep 28
Delta Logo
3:00 pm - 11:24 pmIDA-STL
7h 24m2 stops
Delta Logo
5:30 pm - 10:27 pmSTL-IDA
5h 57m1 stop
$462Delta
Find Deal
Sun, Aug 31 - Fri, Sep 5

United Airlines flights from Idaho Falls to St. Louis

Our best United Airlines deals on Idaho Falls to St. Louis flight tickets
United Airlines
Dec 22
IDA2:35 pmIdaho Falls Fanning Field
5h 24m
1 stop
STL8:59 pmLambert-St Louis
Jan 7
STL9:13 amLambert-St Louis
5h 20m
1 stop
IDA1:33 pmIdaho Falls Fanning Field
$401
Find similar
United Airlines
Dec 22
IDA2:35 pmIdaho Falls Fanning Field
5h 24m
1 stop
STL8:59 pmLambert-St Louis
Jan 7
STL10:30 amLambert-St Louis
7h 52m
2 stops
IDA5:22 pmIdaho Falls Fanning Field
$406
Find similar
United Airlines
Aug 31
IDA5:00 amIdaho Falls Fanning Field
9h 44m
2 stops
STL3:44 pmLambert-St Louis
Sep 5
STL3:20 pmLambert-St Louis
8h 28m
2 stops
IDA10:48 pmIdaho Falls Fanning Field
$511
Find similar

American Airlines flights from Idaho Falls to St. Louis

Our best American Airlines deals on Idaho Falls to St. Louis flight tickets
American Airlines
Sep 24
IDA12:54 pmIdaho Falls Fanning Field
7h 59m
1 stop
STL9:53 pmLambert-St Louis
Sep 28
STL6:05 amLambert-St Louis
7h 04m
1 stop
IDA12:09 pmIdaho Falls Fanning Field
$351
Find similar
American Airlines
Sep 24
IDA6:44 amIdaho Falls Fanning Field
14h 09m
2 stops
STL9:53 pmLambert-St Louis
Sep 28
STL6:05 amLambert-St Louis
7h 04m
1 stop
IDA12:09 pmIdaho Falls Fanning Field
$386
Find similar

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

$175

Fastest flight time

4h 46m

Direct flights

None

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from Idaho Falls in the past 72 hours is $175. The best round-trip flight deal from Idaho Falls to St. Louis found on momondo in the last 72 hours is $351.
The fastest flight from Idaho Falls to St. Louis takes 4h 46m
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)
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  • 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 46m, 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 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.

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Hermann
Fairview Heights
Maryland Heights
Florissant
Collinsville
Fenton
Farmington
O'Fallon
St. Peters
Alton
Wentzville
Festus
Glencoe
Clayton
Eureka
Edwardsville
Grafton
Shrewsbury

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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