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Cheap flights from Missouri to Idaho Falls from $149

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 9/16. 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 Missouri to Idaho Falls

Cheap round-trip flights

Hawaiian Airlines Logo
3:35 pm - 10:39 pmSTL-IDA
8h 04m1 stop
Hawaiian Airlines Logo
6:13 am - 2:39 pmIDA-STL
7h 26m1 stop
$298Hawaiian Airlines
Find Deal
Sat, Sep 27 - Wed, Oct 1
American Airlines Logo
4:18 pm - 9:48 pmSGF-IDA
6h 30m1 stop
American Airlines Logo
12:55 pm - 9:26 pmIDA-SGF
7h 31m1 stop
$299American Airlines
Find Deal
Sat, Oct 18 - Tue, Oct 21
Delta Logo
6:45 pm - 10:27 pmSTL-IDA
4h 42m1 stop
Delta Logo
6:51 pm - 12:38 amIDA-STL
4h 47m1 stop
$299Delta
Find Deal
Tue, Sep 9 - Tue, Sep 16
Delta Logo
6:40 am - 10:39 amMCI-IDA
4h 59m1 stop
Delta Logo
6:52 pm - 11:59 pmIDA-MCI
4h 07m1 stop
$301Delta
Find Deal
Wed, Sep 3 - Tue, Sep 9
Delta Logo
6:45 pm - 10:27 pmSTL-IDA
4h 42m1 stop
Delta Logo
6:51 pm - 8:14 amIDA-STL
12h 23m2 stops
$304Delta
Find Deal
Tue, Sep 9 - Tue, Sep 16
American Airlines Logo
3:10 pm - 9:48 pmMCI-IDA
7h 38m1 stop
American Airlines Logo
6:44 am - 2:18 pmIDA-MCI
6h 34m1 stop
$313American Airlines
Find Deal
Sat, Oct 18 - Tue, Oct 21
United Airlines Logo
6:00 am - 9:47 amMCI-IDA
4h 47m1 stop
United Airlines Logo
5:56 pm - 11:27 pmIDA-MCI
4h 31m1 stop
$371United Airlines
Find Deal
Mon, Sep 1 - Fri, Sep 5
United Airlines Logo
3:23 pm - 10:48 pmMCI-IDA
8h 25m2 stops
United Airlines Logo
5:00 am - 2:20 pmIDA-MCI
8h 20m2 stops
$381United Airlines
Find Deal
Wed, Sep 3 - Tue, Sep 9
Alaska Airlines Logo
5:57 pm - 10:38 pmMCI-IDA
29h 41m2 stops
Alaska Airlines Logo
4:15 pm - 11:59 pmIDA-MCI
6h 44m1 stop
$387Alaska Airlines
Find Deal
Sat, Oct 18 - Wed, Oct 22
Alaska Airlines Logo
7:00 am - 3:38 pmMCI-IDA
9h 38m1 stop
Alaska Airlines Logo
4:15 pm - 4:22 pmIDA-MCI
23h 07m2 stops
$397Alaska Airlines
Find Deal
Tue, Oct 21 - Fri, Oct 24

Hawaiian Airlines flights from Missouri to Idaho Falls

Our best Hawaiian Airlines deals on Missouri to Idaho Falls flight tickets
Hawaiian Airlines
Sep 27
STL3:35 pmLambert-St Louis
8h 04m
1 stop
IDA10:39 pmIdaho Falls Fanning Field
Oct 1
IDA6:13 amIdaho Falls Fanning Field
7h 26m
1 stop
STL2:39 pmLambert-St Louis
$298
Find similar
Hawaiian Airlines
Oct 18
MCI3:28 pmKansas City
8h 10m
1 stop
IDA10:38 pmIdaho Falls Fanning Field
Oct 22
IDA4:15 pmIdaho Falls Fanning Field
6h 44m
1 stop
MCI11:59 pmKansas City
$350
Find similar

Delta flights from Missouri to Idaho Falls

Our best Delta deals on Missouri to Idaho Falls flight tickets
Delta
Sep 9
STL6:45 pmLambert-St Louis
4h 42m
1 stop
IDA10:27 pmIdaho Falls Fanning Field
Sep 16
IDA6:51 pmIdaho Falls Fanning Field
4h 47m
1 stop
STL12:38 amLambert-St Louis
$299
Find similar
Delta
Sep 3
MCI6:40 amKansas City
4h 59m
1 stop
IDA10:39 amIdaho Falls Fanning Field
Sep 9
IDA6:52 pmIdaho Falls Fanning Field
4h 07m
1 stop
MCI11:59 pmKansas City
$301
Find similar
Delta
Sep 9
STL6:45 pmLambert-St Louis
4h 42m
1 stop
IDA10:27 pmIdaho Falls Fanning Field
Sep 16
IDA6:51 pmIdaho Falls Fanning Field
12h 23m
2 stops
STL8:14 amLambert-St Louis
$304
Find similar

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 July 31, 2025.
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

Sat 9/27

3:35 pm-10:39 pm

1 stop8h 04m

Idaho Falls Fanning Field

Wed 10/1

6:13 am-2:39 pm

1 stop7h 26m

$298

SpringfieldIdaho Falls

SGF - IDA

SGFIDA

Springfield-Branson

Sat 10/18

4:18 pm-9:48 pm

1 stop6h 30m

Idaho Falls Fanning Field

Tue 10/21

12:55 pm-9:26 pm

1 stop7h 31m

$299

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Tue 9/9

6:45 pm-10:27 pm

1 stop4h 42m

Idaho Falls Fanning Field

Tue 9/16

6:51 pm-12:38 am

1 stop4h 47m

$299

Kansas CityIdaho Falls

MCI - IDA

MCIIDA

Kansas City

Wed 9/3

6:40 am-10:39 am

1 stop4h 59m

Idaho Falls Fanning Field

Tue 9/9

6:52 pm-11:59 pm

1 stop4h 07m

$301

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Tue 9/9

6:45 pm-10:27 pm

1 stop4h 42m

Idaho Falls Fanning Field

Tue 9/16

6:51 pm-8:14 am

2 stops12h 23m

$304

Kansas CityIdaho Falls

MCI - IDA

MCIIDA

Kansas City

Sat 10/18

3:10 pm-9:48 pm

1 stop7h 38m

Idaho Falls Fanning Field

Tue 10/21

6:44 am-2:18 pm

1 stop6h 34m

$313

Kansas CityIdaho Falls

MCI - IDA

MCIIDA

Kansas City

Mon 9/1

6:00 am-9:47 am

1 stop4h 47m

Idaho Falls Fanning Field

Fri 9/5

5:56 pm-11:27 pm

1 stop4h 31m

$371

Kansas CityIdaho Falls

MCI - IDA

MCIIDA

Kansas City

Wed 9/3

3:23 pm-10:48 pm

2 stops8h 25m

Idaho Falls Fanning Field

Tue 9/9

5:00 am-2:20 pm

2 stops8h 20m

$381

Kansas CityIdaho Falls

MCI - IDA

MCIIDA

Kansas City

Sat 10/18

5:57 pm-10:38 pm

2 stops29h 41m

Idaho Falls Fanning Field

Wed 10/22

4:15 pm-11:59 pm

1 stop6h 44m

$387

Kansas CityIdaho Falls

MCI - IDA

MCIIDA

Kansas City

Tue 10/21

7:00 am-3:38 pm

1 stop9h 38m

Idaho Falls Fanning Field

Fri 10/24

4:15 pm-4:22 pm

2 stops23h 07m

$397

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 day to depart on your flight to Idaho Falls?

Our data shows that Tuesday is the least expensive day to fly to Idaho Falls. Tickets to fly out on this day can be as low as $605. Be sure to avoid booking your departure on a Monday as prices are generally higher than usual. According to our data, the average ticket price to Idaho Falls on Monday is $787.

What is the cheapest time of day to depart on your flight to Idaho Falls?

Our most recent data shows that the best time of day to fly to Idaho Falls is at noon. Flights from Missouri to Idaho Falls during this time can be as low as $651. Try not to purchase tickets in the afternoon because they tend to be around $685. Of course, these prices can vary depending on the time of year and what airport you fly to.

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

Best Price Found

$149

Fastest flight time

4h 38m

Direct flights

None

Airports in Idaho Falls

1 airport
The best one-way flight to Idaho Falls from Missouri in the past 72 hours is $149. The best round-trip flight deal from Missouri to Idaho Falls found on momondo in the last 72 hours is $298.
The fastest flight from Missouri to Idaho Falls takes 4h 38m
There are no direct flights from Missouri to Idaho Falls. Popular non-direct routes for this connection are Kansas City Airport - Idaho Falls Fanning Field Airport, Springfield-Branson Airport - Idaho Falls Fanning Field Airport and Lambert-St Louis Airport - Idaho Falls Fanning Field Airport.
There is 1 airport near Idaho Falls: Idaho Falls Fanning Field (IDA)
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
United AirlinesPriceFrom $236Free CancellationRating
7.4
8,900 reviews
Search United Airlines flights
DeltaPriceFrom $273Free CancellationRating
8.0
7,981 reviews
Search Delta flights
American AirlinesPriceFrom $305Free CancellationRating
7.2
10,000 reviews
Search American 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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