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Cheap flights from Missouri to Idaho Falls from $144

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Missouri to Idaho Falls departing on 4/7. 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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0 bags

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Find the cheapest flights from Missouri to Idaho Falls

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
8:41 am - 1:30 pm
STL
-
IDA
5h 49m
1 stop
United Airlines Logo
5:30 pm - 11:34 pm
IDA
-
STL
5h 04m
1 stop
$279United Airlines
Tue, Mar 3 - Tue, Mar 10
United Airlines Logo
6:25 am - 1:30 pm
STL
-
IDA
8h 05m
2 stops
United Airlines Logo
5:30 pm - 11:34 pm
IDA
-
STL
5h 04m
1 stop
$284United Airlines
Tue, Mar 3 - Tue, Mar 10
Alaska Airlines Logo
7:00 am - 4:43 pm
STL
-
IDA
10h 43m
1 stop
Alaska Airlines Logo
5:20 pm - 1:51 pm
IDA
-
STL
19h 31m
1 stop
$287Alaska Airlines
Wed, Mar 4 - Tue, Mar 10
Alaska Airlines Logo
5:10 pm - 1:06 pm
MCI
-
IDA
20h 56m
1 stop
Alaska Airlines Logo
4:08 pm - 4:06 pm
IDA
-
MCI
22h 58m
1 stop
$309Alaska Airlines
Tue, Jun 2 - Tue, Jun 9
United Airlines Logo
5:15 am - 9:55 am
STL
-
IDA
5h 40m
1 stop
United Airlines Logo
6:03 pm - 11:58 pm
IDA
-
STL
4h 55m
1 stop
$329United Airlines
Thu, Jul 23 - Mon, Jul 27
United Airlines Logo
5:15 am - 9:55 am
STL
-
IDA
5h 40m
1 stop
United Airlines Logo
2:31 pm - 8:42 pm
IDA
-
STL
5h 11m
1 stop
$339United Airlines
Wed, Jul 29 - Wed, Aug 5
United Airlines Logo
8:41 am - 1:30 pm
STL
-
IDA
5h 49m
1 stop
United Airlines Logo
2:40 pm - 8:26 pm
IDA
-
STL
4h 46m
1 stop
$341United Airlines
Tue, Mar 3 - Wed, Mar 4
United Airlines Logo
6:25 am - 1:30 pm
STL
-
IDA
8h 05m
2 stops
United Airlines Logo
2:40 pm - 8:26 pm
IDA
-
STL
4h 46m
1 stop
$346United Airlines
Tue, Mar 3 - Wed, Mar 4
Alaska Airlines Logo
2:47 pm - 11:36 pm
STL
-
IDA
9h 49m
1 stop
Alaska Airlines Logo
8:00 am - 11:59 pm
IDA
-
STL
14h 59m
1 stop
$374Alaska Airlines
Fri, Feb 20 - Mon, Feb 23
United Airlines Logo
6:04 am - 9:55 am
MCI
-
IDA
4h 51m
1 stop
United Airlines Logo
6:03 pm - 11:27 pm
IDA
-
MCI
4h 24m
1 stop
$378United Airlines
Sat, Jul 25 - Fri, Jul 31

United Airlines flights from Missouri to Idaho Falls

Our best United Airlines deals on Missouri to Idaho Falls flight tickets
United Airlines
Mar 3
STL8:41 amLambert-St Louis
5h 49m
1 stop
IDA1:30 pmIdaho Falls Fanning Field
Mar 10
IDA5:30 pmIdaho Falls Fanning Field
5h 04m
1 stop
STL11:34 pmLambert-St Louis
$279
United Airlines
Mar 3
STL6:25 amLambert-St Louis
8h 05m
2 stops
IDA1:30 pmIdaho Falls Fanning Field
Mar 10
IDA5:30 pmIdaho Falls Fanning Field
5h 04m
1 stop
STL11:34 pmLambert-St Louis
$284
United Airlines
Jul 23
STL5:15 amLambert-St Louis
5h 40m
1 stop
IDA9:55 amIdaho Falls Fanning Field
Jul 27
IDA6:03 pmIdaho Falls Fanning Field
4h 55m
1 stop
STL11:58 pmLambert-St Louis
$329

Alaska Airlines flights from Missouri to Idaho Falls

Our best Alaska Airlines deals on Missouri to Idaho Falls flight tickets
Alaska Airlines
Mar 4
STL7:00 amLambert-St Louis
10h 43m
1 stop
IDA4:43 pmIdaho Falls Fanning Field
Mar 10
IDA5:20 pmIdaho Falls Fanning Field
19h 31m
1 stop
STL1:51 pmLambert-St Louis
$287
Alaska Airlines
Jun 2
MCI5:10 pmKansas City
20h 56m
1 stop
IDA1:06 pmIdaho Falls Fanning Field
Jun 9
IDA4:08 pmIdaho Falls Fanning Field
22h 58m
1 stop
MCI4:06 pmKansas City
$309
Alaska Airlines
Feb 20
STL2:47 pmLambert-St Louis
9h 49m
1 stop
IDA11:36 pmIdaho Falls Fanning Field
Feb 23
IDA8:00 amIdaho Falls Fanning Field
14h 59m
1 stop
STL11:59 pmLambert-St Louis
$374

momondo Fare Finder

 
Customize your flight search to find flights from Missouri to Idaho Falls that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated February 5, 2026.
Use the filters below to find and compare flights from Missouri to Idaho Falls that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Tue 3/3

8:41 am-1:30 pm

1 stop5h 49m

Idaho Falls Fanning Field

Tue 3/10

5:30 pm-11:34 pm

1 stop5h 04m

$279

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Tue 3/3

6:25 am-1:30 pm

2 stops8h 05m

Idaho Falls Fanning Field

Tue 3/10

5:30 pm-11:34 pm

1 stop5h 04m

$284

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Wed 3/4

7:00 am-4:43 pm

1 stop10h 43m

Idaho Falls Fanning Field

Tue 3/10

5:20 pm-1:51 pm

1 stop19h 31m

$287

Kansas CityIdaho Falls

MCI - IDA

MCIIDA

Kansas City

Tue 6/2

5:10 pm-1:06 pm

1 stop20h 56m

Idaho Falls Fanning Field

Tue 6/9

4:08 pm-4:06 pm

1 stop22h 58m

$309

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Thu 7/23

5:15 am-9:55 am

1 stop5h 40m

Idaho Falls Fanning Field

Mon 7/27

6:03 pm-11:58 pm

1 stop4h 55m

$329

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Wed 7/29

5:15 am-9:55 am

1 stop5h 40m

Idaho Falls Fanning Field

Wed 8/5

2:31 pm-8:42 pm

1 stop5h 11m

$339

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Tue 3/3

8:41 am-1:30 pm

1 stop5h 49m

Idaho Falls Fanning Field

Wed 3/4

2:40 pm-8:26 pm

1 stop4h 46m

$341

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Tue 3/3

6:25 am-1:30 pm

2 stops8h 05m

Idaho Falls Fanning Field

Wed 3/4

2:40 pm-8:26 pm

1 stop4h 46m

$346

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Fri 2/20

2:47 pm-11:36 pm

1 stop9h 49m

Idaho Falls Fanning Field

Mon 2/23

8:00 am-11:59 pm

1 stop14h 59m

$374

Kansas CityIdaho Falls

MCI - IDA

MCIIDA

Kansas City

Sat 7/25

6:04 am-9:55 am

1 stop4h 51m

Idaho Falls Fanning Field

Fri 7/31

6:03 pm-11:27 pm

1 stop4h 24m

$378

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Idaho Falls from

How to get the cheapest flight ticket from Missouri 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 airline that flies from Missouri to Idaho Falls Fanning Field?

Alaska Airlines, United Airlines, and Delta are the most popular carriers operating from Missouri to Idaho Falls Fanning Field

What airlines fly to Idaho Falls?

United Airlines, Delta and American Airlines are the top three most popular airlines that fly to Idaho Falls from Missouri according to our data. United Airlines is the first choice among our users, with 53% of people opting to fly with this airline when traveling to Idaho Falls. Keep in mind that there are 3 different airlines that fly to Idaho Falls on a routine basis, so you have a few additional options to choose from.

Cheap Missouri to Idaho Falls flight deals and tips

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

Fastest flight time

4h 48m

Direct flights

None
The fastest flight from Missouri to Idaho Falls takes 4h 48m
There are no direct flights from Missouri to Idaho Falls. There are no popular flight routes from Missouri to Idaho Falls.
Search flight deals

  • When did momondo last update prices for flights from Missouri to Idaho Falls Fanning Field Airport?

    Prices for flights from Missouri to Idaho Falls Fanning Field Airport were last updated today.

  • How many operators does momondo search for flights from Missouri to Idaho Falls Fanning Field Airport?

  • How old do you have to be to fly from Missouri to Idaho Falls Fanning Field 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 Missouri 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 you'll need for your trip to Idaho Falls Fanning Field Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Idaho Falls Fanning Field Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Missouri to Idaho Falls

Compare and see reviews for airlines that fly from Missouri to Idaho Falls with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $163Free CancellationRating
7.9
8,151 reviews
Search Delta flights
United AirlinesPriceFrom $235Free CancellationRating
7.4
9,240 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 Missouri to Idaho Falls?

It is quick and easy to find Missouri to Idaho Falls flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Idaho Falls that suits you.

Can I find flights from Missouri to Idaho Falls with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Missouri to Idaho Falls flights to just show those with flexible booking policies.

How can momondo help me find flights from Missouri to Idaho Falls?

momondo provides multiple filters to help you find the best flight to Idaho Falls from Missouri. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

If you are not ready to book a flight from Missouri to Idaho Falls now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Idaho Falls and let you know when they change.

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