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Cheap flights from St. Louis to Idaho Falls from $185

1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Idaho Falls

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
5:00 pm - 10:10 pmSTL  Lambert-St Louis-IDA Idaho Falls Fanning Field
6h 10m1 stop Salt Lake City
Delta Logo
6:57 pm - 12:40 amIDA  Idaho Falls Fanning Field-STL Lambert-St Louis
4h 43m1 stop Salt Lake City
$349Delta
Sat, Oct 24 - Mon, Nov 9
Delta Logo
5:00 pm - 10:10 pmSTL  Lambert-St Louis-IDA Idaho Falls Fanning Field
6h 10m1 stop Salt Lake City
Delta Logo
6:56 pm - 12:44 amIDA  Idaho Falls Fanning Field-STL Lambert-St Louis
4h 48m1 stop Salt Lake City
$349Delta
Sat, Oct 24 - Sun, Nov 8
United Airlines Logo
5:10 am - 9:53 amSTL  Lambert-St Louis-IDA Idaho Falls Fanning Field
5h 43m1 stop Denver Intl
United Airlines Logo
10:35 am - 4:57 pmIDA  Idaho Falls Fanning Field-STL Lambert-St Louis
5h 22m1 stop Denver Intl
$349United Airlines
Sat, Oct 24 - Sat, Nov 7
American Airlines Logo
3:45 pm - 9:49 pmSTL  Lambert-St Louis-IDA Idaho Falls Fanning Field
7h 04m1 stop Dallas/Fort Worth
American Airlines Logo
6:18 am - 1:38 pmIDA  Idaho Falls Fanning Field-STL Lambert-St Louis
6h 20m1 stop Phoenix Sky Harbor Intl
$349American Airlines
Thu, Jan 28 - Sun, Jan 31
American Airlines Logo
5:40 am - 1:09 pmSTL  Lambert-St Louis-IDA Idaho Falls Fanning Field
8h 29m1 stop Dallas/Fort Worth
American Airlines Logo
1:50 pm - 9:13 pmIDA  Idaho Falls Fanning Field-STL Lambert-St Louis
6h 23m1 stop Chicago O'Hare Intl
$349American Airlines
Thu, Oct 29 - Sat, Oct 31
Delta Logo
7:45 am - 12:22 pmSTL  Lambert-St Louis-IDA Idaho Falls Fanning Field
5h 37m1 stop Salt Lake City
Delta Logo
6:56 pm - 12:44 amIDA  Idaho Falls Fanning Field-STL Lambert-St Louis
4h 48m1 stop Salt Lake City
$349Delta
Tue, Oct 27 - Sun, Nov 8
Delta Logo
5:00 pm - 10:10 pmSTL  Lambert-St Louis-IDA Idaho Falls Fanning Field
6h 10m1 stop Salt Lake City
Delta Logo
6:00 am - 1:30 pmIDA  Idaho Falls Fanning Field-STL Lambert-St Louis
6h 30m1 stop Salt Lake City
$349Delta
Sat, Oct 24 - Tue, Nov 10
United Airlines Logo
5:10 am - 9:53 amSTL  Lambert-St Louis-IDA Idaho Falls Fanning Field
5h 43m1 stop Denver Intl
United Airlines Logo
10:35 am - 9:40 pmIDA  Idaho Falls Fanning Field-STL Lambert-St Louis
10h 05m2 stops Denver Intl Chicago O'Hare Intl
$354United Airlines
Sat, Oct 24 - Sat, Nov 7
American Airlines Logo
2:17 pm - 10:31 pmSTL  Lambert-St Louis-IDA Idaho Falls Fanning Field
9h 14m1 stop Phoenix Sky Harbor Intl
American Airlines Logo
6:44 am - 7:50 pmIDA  Idaho Falls Fanning Field-STL Lambert-St Louis
12h 06m2 stops Phoenix Sky Harbor Intl Chicago O'Hare Intl
$354American Airlines
Thu, Nov 19 - Mon, Nov 23
United Airlines Logo
5:10 am - 9:53 amSTL  Lambert-St Louis-IDA Idaho Falls Fanning Field
5h 43m1 stop Denver Intl
United Airlines Logo
2:28 pm - 8:36 pmIDA  Idaho Falls Fanning Field-STL Lambert-St Louis
5h 08m1 stop Denver Intl
$374United Airlines
Thu, Oct 15 - Sat, Oct 24

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Delta flights from St. Louis to Idaho Falls

Our best Delta deals on St. Louis to Idaho Falls flight tickets
Delta
Oct 24
STL5:00 pmLambert-St Louis
6h 10m
1 stop
IDA10:10 pmIdaho Falls Fanning Field
Nov 9
IDA6:57 pmIdaho Falls Fanning Field
13h 03m
2 stops
STL9:00 amLambert-St Louis
$354
Delta
Oct 27
STL3:35 pmLambert-St Louis
7h 35m
2 stops
IDA10:10 pmIdaho Falls Fanning Field
Nov 8
IDA6:56 pmIdaho Falls Fanning Field
13h 04m
2 stops
STL9:00 amLambert-St Louis
$359
Delta
Oct 29
STL7:45 amLambert-St Louis
5h 37m
1 stop
IDA12:22 pmIdaho Falls Fanning Field
Oct 31
IDA1:05 pmIdaho Falls Fanning Field
7h 20m
2 stops
STL9:25 pmLambert-St Louis
$379

United Airlines flights from St. Louis to Idaho Falls

Our best United Airlines deals on St. Louis to Idaho Falls flight tickets
United Airlines
Oct 24
STL5:10 amLambert-St Louis
5h 43m
1 stop
IDA9:53 amIdaho Falls Fanning Field
Nov 7
IDA10:35 amIdaho Falls Fanning Field
5h 22m
1 stop
STL4:57 pmLambert-St Louis
$349
United Airlines
Oct 15
STL5:10 amLambert-St Louis
5h 43m
1 stop
IDA9:53 amIdaho Falls Fanning Field
Oct 24
IDA2:28 pmIdaho Falls Fanning Field
5h 08m
1 stop
STL8:36 pmLambert-St Louis
$374
United Airlines
Oct 15
STL9:00 amLambert-St Louis
7h 24m
1 stop
IDA3:24 pmIdaho Falls Fanning Field
Oct 24
IDA2:28 pmIdaho Falls Fanning Field
8h 03m
2 stops
STL11:31 pmLambert-St Louis
$399

momondo Fare Finder

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

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Route

Depart

Return

Price

Cheapest round-trip

St. LouisIdaho Falls

STL Lambert-St Louis - IDA Idaho Falls Fanning Field

STLIDA

Lambert-St Louis

Sat 10/24

5:00 pm-10:10 pm

1 stop6h 10m

Idaho Falls Fanning Field

Mon 11/9

6:57 pm-12:40 am

1 stop4h 43m

$349

St. LouisIdaho Falls

STL Lambert-St Louis - IDA Idaho Falls Fanning Field

STLIDA

Lambert-St Louis

Sat 10/24

5:00 pm-10:10 pm

1 stop6h 10m

Idaho Falls Fanning Field

Sun 11/8

6:56 pm-12:44 am

1 stop4h 48m

$349

St. LouisIdaho Falls

STL Lambert-St Louis - IDA Idaho Falls Fanning Field

STLIDA

Lambert-St Louis

Sat 10/24

5:10 am-9:53 am

1 stop5h 43m

Idaho Falls Fanning Field

Sat 11/7

10:35 am-4:57 pm

1 stop5h 22m

$349

St. LouisIdaho Falls

STL Lambert-St Louis - IDA Idaho Falls Fanning Field

STLIDA

Lambert-St Louis

Thu 1/28

3:45 pm-9:49 pm

1 stop7h 04m

Idaho Falls Fanning Field

Sun 1/31

6:18 am-1:38 pm

1 stop6h 20m

$349

St. LouisIdaho Falls

STL Lambert-St Louis - IDA Idaho Falls Fanning Field

STLIDA

Lambert-St Louis

Thu 10/29

5:40 am-1:09 pm

1 stop8h 29m

Idaho Falls Fanning Field

Sat 10/31

1:50 pm-9:13 pm

1 stop6h 23m

$349
Quickest round-trip

St. LouisIdaho Falls

STL Lambert-St Louis - IDA Idaho Falls Fanning Field

STLIDA

Lambert-St Louis

Tue 10/27

7:45 am-12:22 pm

1 stop5h 37m

Idaho Falls Fanning Field

Sun 11/8

6:56 pm-12:44 am

1 stop4h 48m

$349

St. LouisIdaho Falls

STL Lambert-St Louis - IDA Idaho Falls Fanning Field

STLIDA

Lambert-St Louis

Sat 10/24

5:00 pm-10:10 pm

1 stop6h 10m

Idaho Falls Fanning Field

Tue 11/10

6:00 am-1:30 pm

1 stop6h 30m

$349

St. LouisIdaho Falls

STL Lambert-St Louis - IDA Idaho Falls Fanning Field

STLIDA

Lambert-St Louis

Sat 10/24

5:10 am-9:53 am

1 stop5h 43m

Idaho Falls Fanning Field

Sat 11/7

10:35 am-9:40 pm

2 stops10h 05m

$354

St. LouisIdaho Falls

STL Lambert-St Louis - IDA Idaho Falls Fanning Field

STLIDA

Lambert-St Louis

Thu 11/19

2:17 pm-10:31 pm

1 stop9h 14m

Idaho Falls Fanning Field

Mon 11/23

6:44 am-7:50 pm

2 stops12h 06m

$354

St. LouisIdaho Falls

STL Lambert-St Louis - IDA Idaho Falls Fanning Field

STLIDA

Lambert-St Louis

Thu 10/15

5:10 am-9:53 am

1 stop5h 43m

Idaho Falls Fanning Field

Sat 10/24

2:28 pm-8:36 pm

1 stop5h 08m

$374

Flights are sorted by cheapest round-trip flights first.

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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 September is also cheap. Prices for this month can be found on momondo for an average of $434.

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

$185

Fastest flight time

5h 43m

Direct flights

None
The best one-way flight to Idaho Falls from St. Louis in the past 72 hours is $185. The best round-trip flight deal from St. Louis to Idaho Falls found on momondo in the last 72 hours is $349.
The fastest flight from St. Louis to Idaho Falls takes 5h 43m
There are no direct flights from St. Louis to Idaho Falls. There are no popular flight routes from St. Louis to Idaho Falls.
Search flight deals

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

  • 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 43m 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
United AirlinesPriceFrom $338Free CancellationRating
7.4
10,261 reviews
Search United Airlines flights
DeltaPriceFrom $446Free CancellationRating
7.8
8,608 reviews
Search Delta flights

Traveling to a place near Idaho Falls?

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

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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.

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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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