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Cheap flights from Idaho Falls to St. Louis from $213

1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Idaho Falls to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
6:18 am - 1:38 pmIDA  Idaho Falls Fanning Field-STL Lambert-St Louis
6h 20m1 stop Phoenix Sky Harbor Intl
American Airlines Logo
2:28 pm - 11:11 pmSTL  Lambert-St Louis-IDA Idaho Falls Fanning Field
9h 43m1 stop Phoenix Sky Harbor Intl
$349American Airlines
Sat, Jan 30 - Sat, Feb 6
Delta Logo
6:00 am - 2:36 pmIDA  Idaho Falls Fanning Field-STL Lambert-St Louis
7h 36m1 stop Salt Lake City
Delta Logo
7:08 am - 12:17 pmSTL  Lambert-St Louis-IDA Idaho Falls Fanning Field
6h 09m1 stop Salt Lake City
$349Delta
Thu, Nov 26 - Tue, Dec 8
United Airlines Logo
2:30 pm - 8:38 pmIDA  Idaho Falls Fanning Field-STL Lambert-St Louis
5h 08m1 stop Denver Intl
United Airlines Logo
10:45 am - 9:10 pmSTL  Lambert-St Louis-IDA Idaho Falls Fanning Field
11h 25m2 stops Chicago O'Hare Intl Denver Intl
$354United Airlines
Sat, Jan 30 - Sat, Feb 6
Delta Logo
1:11 pm - 10:53 pmIDA  Idaho Falls Fanning Field-STL Lambert-St Louis
8h 42m2 stops Salt Lake City Atlanta Hartsfield-Jackson
Delta Logo
7:08 am - 12:17 pmSTL  Lambert-St Louis-IDA Idaho Falls Fanning Field
6h 09m1 stop Salt Lake City
$354Delta
Thu, Nov 26 - Tue, Dec 8
Delta Logo
6:00 am - 2:36 pmIDA  Idaho Falls Fanning Field-STL Lambert-St Louis
7h 36m1 stop Salt Lake City
Delta Logo
2:17 pm - 10:07 pmSTL  Lambert-St Louis-IDA Idaho Falls Fanning Field
8h 50m2 stops Detroit Metropolitan Wayne County Salt Lake City
$354Delta
Thu, Nov 26 - Mon, Dec 7
United Airlines Logo
7:00 am - 4:20 pmIDA  Idaho Falls Fanning Field-STL Lambert-St Louis
8h 20m2 stops Denver Intl Chicago O'Hare Intl
United Airlines Logo
1:17 pm - 9:10 pmSTL  Lambert-St Louis-IDA Idaho Falls Fanning Field
8h 53m2 stops Chicago O'Hare Intl Denver Intl
$359United Airlines
Sat, Jan 30 - Sat, Feb 6
Alaska Airlines Logo
6:00 am - 4:40 pmIDA  Idaho Falls Fanning Field-STL Lambert-St Louis
9h 40m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
6:04 am - 3:07 pmSTL  Lambert-St Louis-IDA Idaho Falls Fanning Field
10h 03m1 stop Seattle/Tacoma Intl
$369Alaska Airlines
Sat, Dec 5 - Wed, Dec 9
American Airlines Logo
1:41 pm - 8:27 pmIDA  Idaho Falls Fanning Field-STL Lambert-St Louis
5h 46m1 stop Dallas/Fort Worth
American Airlines Logo
2:23 pm - 11:02 pmSTL  Lambert-St Louis-IDA Idaho Falls Fanning Field
9h 39m1 stop Phoenix Sky Harbor Intl
$369American Airlines
Tue, Dec 8 - Thu, Dec 10
American Airlines Logo
8:00 am - 5:46 pmIDA  Idaho Falls Fanning Field-STL Lambert-St Louis
8h 46m1 stop Dallas/Fort Worth
American Airlines Logo
8:43 am - 5:05 pmSTL  Lambert-St Louis-IDA Idaho Falls Fanning Field
9h 22m2 stops Dallas/Fort Worth Phoenix Sky Harbor Intl
$374American Airlines
Tue, Dec 8 - Thu, Dec 10
Alaska Airlines Logo
1:52 pm - 11:59 pmIDA  Idaho Falls Fanning Field-STL Lambert-St Louis
9h 07m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
6:00 am - 3:18 pmSTL  Lambert-St Louis-IDA Idaho Falls Fanning Field
10h 18m1 stop Seattle/Tacoma Intl
$577Alaska Airlines
Thu, Dec 24 - Thu, Dec 31

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Delta flights from Idaho Falls to St. Louis

Our best Delta deals on Idaho Falls to St. Louis flight tickets
Delta
Nov 26
IDA6:00 amIdaho Falls Fanning Field
7h 36m
1 stop
STL2:36 pmLambert-St Louis
Dec 8
STL7:08 amLambert-St Louis
6h 09m
1 stop
IDA12:17 pmIdaho Falls Fanning Field
$349
Delta
Nov 26
IDA1:11 pmIdaho Falls Fanning Field
8h 42m
2 stops
STL10:53 pmLambert-St Louis
Dec 8
STL7:08 amLambert-St Louis
6h 09m
1 stop
IDA12:17 pmIdaho Falls Fanning Field
$354
Delta
Nov 26
IDA6:00 amIdaho Falls Fanning Field
13h 09m
2 stops
STL8:09 pmLambert-St Louis
Dec 7
STL2:17 pmLambert-St Louis
8h 50m
2 stops
IDA10:07 pmIdaho Falls Fanning Field
$359

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 8
IDA2:40 pmIdaho Falls Fanning Field
5h 17m
1 stop
STL8:57 pmLambert-St Louis
Dec 9
STL8:40 amLambert-St Louis
7h 49m
1 stop
IDA3:29 pmIdaho Falls Fanning Field
$369
United Airlines
Dec 8
IDA2:40 pmIdaho Falls Fanning Field
5h 17m
1 stop
STL8:57 pmLambert-St Louis
Dec 9
STL6:30 amLambert-St Louis
8h 07m
2 stops
IDA1:37 pmIdaho Falls Fanning Field
$374
United Airlines
Dec 1
IDA2:40 pmIdaho Falls Fanning Field
5h 17m
1 stop
STL8:57 pmLambert-St Louis
Dec 4
STL8:40 amLambert-St Louis
5h 57m
1 stop
IDA1:37 pmIdaho Falls Fanning Field
$383

momondo Fare Finder

 
Use the filters below to find and compare flights from Idaho Falls to St. Louis that are best for you.

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Route

Depart

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Price

Cheapest round-trip

Idaho FallsSt. Louis

IDA Idaho Falls Fanning Field - STL Lambert-St Louis

IDASTL

Idaho Falls Fanning Field

Sat 1/30

6:18 am-1:38 pm

1 stop6h 20m

Lambert-St Louis

Sat 2/6

2:28 pm-11:11 pm

1 stop9h 43m

$349
Quickest round-trip

Idaho FallsSt. Louis

IDA Idaho Falls Fanning Field - STL Lambert-St Louis

IDASTL

Idaho Falls Fanning Field

Thu 11/26

6:00 am-2:36 pm

1 stop7h 36m

Lambert-St Louis

Tue 12/8

7:08 am-12:17 pm

1 stop6h 09m

$349

Idaho FallsSt. Louis

IDA Idaho Falls Fanning Field - STL Lambert-St Louis

IDASTL

Idaho Falls Fanning Field

Sat 1/30

2:30 pm-8:38 pm

1 stop5h 08m

Lambert-St Louis

Sat 2/6

10:45 am-9:10 pm

2 stops11h 25m

$354

Idaho FallsSt. Louis

IDA Idaho Falls Fanning Field - STL Lambert-St Louis

IDASTL

Idaho Falls Fanning Field

Thu 11/26

1:11 pm-10:53 pm

2 stops8h 42m

Lambert-St Louis

Tue 12/8

7:08 am-12:17 pm

1 stop6h 09m

$354

Idaho FallsSt. Louis

IDA Idaho Falls Fanning Field - STL Lambert-St Louis

IDASTL

Idaho Falls Fanning Field

Thu 11/26

6:00 am-2:36 pm

1 stop7h 36m

Lambert-St Louis

Mon 12/7

2:17 pm-10:07 pm

2 stops8h 50m

$354

Idaho FallsSt. Louis

IDA Idaho Falls Fanning Field - STL Lambert-St Louis

IDASTL

Idaho Falls Fanning Field

Sat 1/30

7:00 am-4:20 pm

2 stops8h 20m

Lambert-St Louis

Sat 2/6

1:17 pm-9:10 pm

2 stops8h 53m

$359

Idaho FallsSt. Louis

IDA Idaho Falls Fanning Field - STL Lambert-St Louis

IDASTL

Idaho Falls Fanning Field

Sat 12/5

6:00 am-4:40 pm

1 stop9h 40m

Lambert-St Louis

Wed 12/9

6:04 am-3:07 pm

1 stop10h 03m

$369

Idaho FallsSt. Louis

IDA Idaho Falls Fanning Field - STL Lambert-St Louis

IDASTL

Idaho Falls Fanning Field

Tue 12/8

1:41 pm-8:27 pm

1 stop5h 46m

Lambert-St Louis

Thu 12/10

2:23 pm-11:02 pm

1 stop9h 39m

$369

Idaho FallsSt. Louis

IDA Idaho Falls Fanning Field - STL Lambert-St Louis

IDASTL

Idaho Falls Fanning Field

Tue 12/8

8:00 am-5:46 pm

1 stop8h 46m

Lambert-St Louis

Thu 12/10

8:43 am-5:05 pm

2 stops9h 22m

$374

Idaho FallsSt. Louis

IDA Idaho Falls Fanning Field - STL Lambert-St Louis

IDASTL

Idaho Falls Fanning Field

Thu 12/24

1:52 pm-11:59 pm

1 stop9h 07m

Lambert-St Louis

Thu 12/31

6:00 am-3:18 pm

1 stop10h 18m

$577

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 resultsSorted by cheapest first
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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 typical price of a round-trip flight between Idaho Falls and St. Louis?

Prices are currently low for flights on this route.

Typical prices usually range from $491 to $760.
The lowest price recently found on this route was $349.

What is the cheapest month to fly to St. Louis?

In general, May is the cheapest month to fly from Idaho Falls to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $443. The month of June is another great option to travel to St. Louis, with average flight prices from Idaho Falls averaging around $466.

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

$213

Fastest flight time

5h 17m

Direct flights

None
The best one-way flight to St. Louis from Idaho Falls in the past 72 hours is $213. The best round-trip flight deal from Idaho Falls to St. Louis found on momondo in the last 72 hours is $349.
The fastest flight from Idaho Falls to St. Louis takes 5h 17m
There are no direct flights from Idaho Falls to St. Louis. There are no popular flight routes from Idaho Falls to St. Louis.
Search flight deals

Frequently asked questions about flying from Idaho Falls to St. Louis

  • 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 5h 17m, 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 $164Free CancellationRating
7.8
8,696 reviews
Search Delta flights
American AirlinesPriceFrom $328Free CancellationRating
7.0
12,229 reviews
Search American Airlines flights
United AirlinesPriceFrom $421Free CancellationRating
7.3
10,459 reviews
Search United Airlines flights

Traveling to a place near St. Louis?

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

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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