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Cheap flights from Missouri to Idaho Falls from $166

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 5/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
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.
Alaska Airlines Logo
3:50 pm - 10:52 pm
STL
-
IDA
8h 02m
1 stop
Alaska Airlines Logo
4:06 pm - 11:59 pm
IDA
-
STL
6h 53m
1 stop
$319Alaska Airlines
Tue, Apr 21 - Tue, Apr 28
Multiple Airlines Logo
6:04 pm - 3:27 pm
MCI
-
IDA
22h 23m
1 stop
Multiple Airlines Logo
10:21 pm - 2:06 pm
IDA
-
MCI
14h 45m
2 stops
$338Multiple Airlines
Sun, Apr 12 - Fri, Apr 17
Delta Logo
6:45 pm - 10:40 pm
STL
-
IDA
4h 55m
1 stop
Delta Logo
6:58 pm - 8:30 am
IDA
-
STL
12h 32m
2 stops
$339Delta
Tue, Apr 21 - Tue, Apr 28
United Airlines Logo
6:00 am - 9:50 am
MCI
-
IDA
4h 50m
1 stop
United Airlines Logo
2:30 pm - 8:43 pm
IDA
-
MCI
5h 13m
1 stop
$372United Airlines
Wed, Jun 10 - Wed, Jun 17
Delta Logo
8:00 am - 2:41 pm
STL
-
IDA
7h 41m
1 stop
Delta Logo
6:00 am - 1:36 pm
IDA
-
STL
6h 36m
1 stop
$379Delta
Sat, Jun 27 - Sat, Jul 4
Delta Logo
2:15 pm - 6:17 pm
MCI
-
IDA
5h 02m
1 stop
Delta Logo
5:47 am - 1:20 pm
IDA
-
MCI
6h 33m
1 stop
$380Delta
Mon, Apr 13 - Sat, Apr 18
Alaska Airlines Logo
6:15 am - 4:19 pm
MCI
-
IDA
11h 04m
1 stop
Alaska Airlines Logo
4:59 pm - 1:29 pm
IDA
-
MCI
19h 30m
1 stop
$394Alaska Airlines
Fri, Apr 10 - Fri, Apr 17
United Airlines Logo
5:40 am - 9:53 am
SGF
-
IDA
5h 13m
1 stop
United Airlines Logo
2:30 pm - 8:44 pm
IDA
-
SGF
5h 14m
1 stop
$404United Airlines
Wed, Aug 12 - Mon, Aug 17
American Airlines Logo
6:00 am - 1:38 pm
STL
-
IDA
8h 38m
1 stop
American Airlines Logo
7:00 am - 11:54 pm
IDA
-
STL
15h 54m
2 stops
$473American Airlines
Sun, May 24 - Sat, May 30
American Airlines Logo
7:02 am - 1:44 pm
SGF
-
IDA
7h 42m
1 stop
American Airlines Logo
1:44 pm - 8:25 pm
IDA
-
SGF
5h 41m
1 stop
$603American Airlines
Tue, Sep 8 - Sun, Sep 13

Alaska Airlines flights from Missouri to Idaho Falls

Our best Alaska Airlines deals on Missouri to Idaho Falls flight tickets
Alaska Airlines
Jun 1
STL5:33 pmLambert-St Louis
20h 44m
1 stop
IDA1:17 pmIdaho Falls Fanning Field
Jun 4
IDA4:03 pmIdaho Falls Fanning Field
23h 34m
1 stop
STL4:37 pmLambert-St Louis
$369
Alaska Airlines
Apr 10
MCI6:15 amKansas City
11h 04m
1 stop
IDA4:19 pmIdaho Falls Fanning Field
Apr 17
IDA4:59 pmIdaho Falls Fanning Field
19h 30m
1 stop
MCI1:29 pmKansas City
$394
Alaska Airlines
Apr 10
MCI6:15 amKansas City
11h 04m
1 stop
IDA4:19 pmIdaho Falls Fanning Field
Apr 14
IDA4:59 pmIdaho Falls Fanning Field
19h 30m
1 stop
MCI1:29 pmKansas City
$395

American Airlines flights from Missouri to Idaho Falls

Our best American Airlines deals on Missouri to Idaho Falls flight tickets
American Airlines
May 24
STL6:00 amLambert-St Louis
8h 38m
1 stop
IDA1:38 pmIdaho Falls Fanning Field
May 30
IDA7:00 amIdaho Falls Fanning Field
15h 54m
2 stops
STL11:54 pmLambert-St Louis
$473
American Airlines
Aug 3
STL5:29 amLambert-St Louis
7h 30m
1 stop
IDA11:59 amIdaho Falls Fanning Field
Aug 8
IDA7:00 amIdaho Falls Fanning Field
6h 45m
1 stop
STL2:45 pmLambert-St Louis
$545
American Airlines
Sep 8
SGF7:02 amSpringfield-Branson
7h 42m
1 stop
IDA1:44 pmIdaho Falls Fanning Field
Sep 13
IDA1:44 pmIdaho Falls Fanning Field
5h 41m
1 stop
SGF8:25 pmSpringfield-Branson
$603

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 March 28, 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

Cheapest round-trip

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Tue 4/21

3:50 pm-10:52 pm

1 stop8h 02m

Idaho Falls Fanning Field

Tue 4/28

4:06 pm-11:59 pm

1 stop6h 53m

$319

Kansas CityIdaho Falls

MCI - IDA

MCIIDA

Kansas City

Sun 4/12

6:04 pm-3:27 pm

1 stop22h 23m

Idaho Falls Fanning Field

Fri 4/17

10:21 pm-2:06 pm

2 stops14h 45m

$338

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Tue 4/21

6:45 pm-10:40 pm

1 stop4h 55m

Idaho Falls Fanning Field

Tue 4/28

6:58 pm-8:30 am

2 stops12h 32m

$339
Quickest round-trip

Kansas CityIdaho Falls

MCI - IDA

MCIIDA

Kansas City

Wed 6/10

6:00 am-9:50 am

1 stop4h 50m

Idaho Falls Fanning Field

Wed 6/17

2:30 pm-8:43 pm

1 stop5h 13m

$372

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Sat 6/27

8:00 am-2:41 pm

1 stop7h 41m

Idaho Falls Fanning Field

Sat 7/4

6:00 am-1:36 pm

1 stop6h 36m

$379

Kansas CityIdaho Falls

MCI - IDA

MCIIDA

Kansas City

Mon 4/13

2:15 pm-6:17 pm

1 stop5h 02m

Idaho Falls Fanning Field

Sat 4/18

5:47 am-1:20 pm

1 stop6h 33m

$380

Kansas CityIdaho Falls

MCI - IDA

MCIIDA

Kansas City

Fri 4/10

6:15 am-4:19 pm

1 stop11h 04m

Idaho Falls Fanning Field

Fri 4/17

4:59 pm-1:29 pm

1 stop19h 30m

$394

SpringfieldIdaho Falls

SGF - IDA

SGFIDA

Springfield-Branson

Wed 8/12

5:40 am-9:53 am

1 stop5h 13m

Idaho Falls Fanning Field

Mon 8/17

2:30 pm-8:44 pm

1 stop5h 14m

$404

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Sun 5/24

6:00 am-1:38 pm

1 stop8h 38m

Idaho Falls Fanning Field

Sat 5/30

7:00 am-11:54 pm

2 stops15h 54m

$473

SpringfieldIdaho Falls

SGF - IDA

SGFIDA

Springfield-Branson

Tue 9/8

7:02 am-1:44 pm

1 stop7h 42m

Idaho Falls Fanning Field

Sun 9/13

1:44 pm-8:25 pm

1 stop5h 41m

$603

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?

United Airlines, Alaska Airlines, and American Airlines 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 54% 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 41m

Direct flights

None
The fastest flight from Missouri to Idaho Falls takes 4h 41m
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
8,356 reviews
Search Delta flights
United AirlinesPriceFrom $252Free CancellationRating
7.4
9,499 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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