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Cheap flights from Missouri to Idaho Falls from $165

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 10/14. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Missouri to Idaho Falls

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
10:20 am - 4:00 pmSTL  Lambert-St Louis-IDA Idaho Falls Fanning Field
30h 40m2 stops Dallas/Fort Worth Las Vegas Harry Reid Intl
Multiple Airlines Logo
7:42 pm - 11:32 amIDA  Idaho Falls Fanning Field-STL Lambert-St Louis
14h 50m1 stop Las Vegas Harry Reid Intl
$341Multiple Airlines
Thu, Oct 1 - Mon, Oct 5
Multiple Airlines Logo
10:20 am - 4:00 pmSTL  Lambert-St Louis-IDA Idaho Falls Fanning Field
30h 40m2 stops Dallas/Fort Worth Las Vegas Harry Reid Intl
Multiple Airlines Logo
7:42 pm - 11:32 amIDA  Idaho Falls Fanning Field-STL Lambert-St Louis
14h 50m1 stop Las Vegas Harry Reid Intl
$354Multiple Airlines
Thu, Oct 1 - Mon, Oct 5
United Airlines Logo
6:00 am - 9:53 amMCI  Kansas City-IDA Idaho Falls Fanning Field
4h 53m1 stop Denver Intl
United Airlines Logo
4:05 pm - 11:44 pmIDA  Idaho Falls Fanning Field-MCI Kansas City
6h 39m1 stop Denver Intl
$354United Airlines
Wed, Oct 7 - Sun, Oct 11
Alaska Airlines Logo
6:17 am - 3:20 pmMCI  Kansas City-IDA Idaho Falls Fanning Field
10h 03m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
1:58 pm - 11:59 pmIDA  Idaho Falls Fanning Field-MCI Kansas City
9h 01m1 stop Seattle/Tacoma Intl
$360Alaska Airlines
Wed, Oct 14 - Sun, Oct 18
Alaska Airlines Logo
6:09 pm - 1:16 pmMCI  Kansas City-IDA Idaho Falls Fanning Field
20h 07m1 stop Portland
Alaska Airlines Logo
1:53 pm - 11:59 pmIDA  Idaho Falls Fanning Field-MCI Kansas City
9h 06m1 stop Seattle/Tacoma Intl
$360Alaska Airlines
Mon, Nov 9 - Thu, Nov 12
Delta Logo
5:00 pm - 10:32 pmSTL  Lambert-St Louis-IDA Idaho Falls Fanning Field
6h 32m1 stop Salt Lake City
Delta Logo
1:05 pm - 9:31 pmIDA  Idaho Falls Fanning Field-STL Lambert-St Louis
7h 26m1 stop Salt Lake City
$374Delta
Sun, Sep 6 - Wed, Sep 9
United Airlines Logo
9:00 am - 1:29 pmSTL  Lambert-St Louis-IDA Idaho Falls Fanning Field
5h 29m1 stop Denver Intl
United Airlines Logo
2:25 pm - 8:46 pmIDA  Idaho Falls Fanning Field-STL Lambert-St Louis
5h 21m1 stop Denver Intl
$379United Airlines
Fri, Aug 28 - Tue, Sep 1
United Airlines Logo
9:00 am - 1:29 pmSTL  Lambert-St Louis-IDA Idaho Falls Fanning Field
5h 29m1 stop Denver Intl
United Airlines Logo
2:25 pm - 8:38 pmIDA  Idaho Falls Fanning Field-STL Lambert-St Louis
5h 13m1 stop Denver Intl
$384United Airlines
Sun, Sep 6 - Wed, Sep 9
Delta Logo
2:13 pm - 10:32 pmMCI  Kansas City-IDA Idaho Falls Fanning Field
9h 19m2 stops Detroit Metropolitan Wayne County Salt Lake City
Delta Logo
6:00 am - 4:50 pmIDA  Idaho Falls Fanning Field-MCI Kansas City
9h 50m2 stops Salt Lake City Minneapolis St Paul
$420Delta
Tue, Aug 25 - Sat, Aug 29
Delta Logo
2:59 pm - 6:16 pmMCI  Kansas City-IDA Idaho Falls Fanning Field
4h 17m1 stop Salt Lake City
Delta Logo
1:11 pm - 11:20 pmIDA  Idaho Falls Fanning Field-MCI Kansas City
9h 09m2 stops Salt Lake City Minneapolis St Paul
$490Delta
Mon, Nov 9 - Thu, Nov 12

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Allegiant Air flights from Missouri to Idaho Falls

Our best Allegiant Air deals on Missouri to Idaho Falls flight tickets
Allegiant Air
Oct 1
SGF9:17 pmSpringfield-Branson
12h 45m
1 stop
IDA9:02 amIdaho Falls Fanning Field
Oct 5
IDA6:30 pmIdaho Falls Fanning Field
18h 02m
1 stop
SGF1:32 pmSpringfield-Branson
$399
Allegiant Air
Oct 1
SGF9:17 pmSpringfield-Branson
12h 45m
1 stop
IDA9:02 amIdaho Falls Fanning Field
Oct 4
IDA10:02 amIdaho Falls Fanning Field
10h 05m
1 stop
SGF9:07 pmSpringfield-Branson
$400

Delta flights from Missouri to Idaho Falls

Our best Delta deals on Missouri to Idaho Falls flight tickets
Delta
Aug 25
MCI2:13 pmKansas City
9h 19m
2 stops
IDA10:32 pmIdaho Falls Fanning Field
Aug 29
IDA6:00 amIdaho Falls Fanning Field
9h 50m
2 stops
MCI4:50 pmKansas City
$420
Delta
Aug 22
MCI7:00 amKansas City
4h 50m
1 stop
IDA10:50 amIdaho Falls Fanning Field
Aug 29
IDA6:00 amIdaho Falls Fanning Field
8h 14m
2 stops
MCI3:14 pmKansas City
$429
Delta
Nov 9
MCI2:59 pmKansas City
4h 17m
1 stop
IDA6:16 pmIdaho Falls Fanning Field
Nov 12
IDA1:11 pmIdaho Falls Fanning Field
9h 09m
2 stops
MCI11:20 pmKansas City
$490

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 August 14, 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 Lambert-St Louis - IDA Idaho Falls Fanning Field

STLIDA

Lambert-St Louis

Thu 10/1

10:20 am-4:00 pm

2 stops30h 40m

Idaho Falls Fanning Field

Mon 10/5

7:42 pm-11:32 am

1 stop14h 50m

$341

St. LouisIdaho Falls

STL Lambert-St Louis - IDA Idaho Falls Fanning Field

STLIDA

Lambert-St Louis

Thu 10/1

10:20 am-4:00 pm

2 stops30h 40m

Idaho Falls Fanning Field

Mon 10/5

7:42 pm-11:32 am

1 stop14h 50m

$354

Kansas CityIdaho Falls

MCI Kansas City - IDA Idaho Falls Fanning Field

MCIIDA

Kansas City

Wed 10/7

6:00 am-9:53 am

1 stop4h 53m

Idaho Falls Fanning Field

Sun 10/11

4:05 pm-11:44 pm

1 stop6h 39m

$354

Kansas CityIdaho Falls

MCI Kansas City - IDA Idaho Falls Fanning Field

MCIIDA

Kansas City

Wed 10/14

6:17 am-3:20 pm

1 stop10h 03m

Idaho Falls Fanning Field

Sun 10/18

1:58 pm-11:59 pm

1 stop9h 01m

$360

Kansas CityIdaho Falls

MCI Kansas City - IDA Idaho Falls Fanning Field

MCIIDA

Kansas City

Mon 11/9

6:09 pm-1:16 pm

1 stop20h 07m

Idaho Falls Fanning Field

Thu 11/12

1:53 pm-11:59 pm

1 stop9h 06m

$360

St. LouisIdaho Falls

STL Lambert-St Louis - IDA Idaho Falls Fanning Field

STLIDA

Lambert-St Louis

Sun 9/6

5:00 pm-10:32 pm

1 stop6h 32m

Idaho Falls Fanning Field

Wed 9/9

1:05 pm-9:31 pm

1 stop7h 26m

$374

St. LouisIdaho Falls

STL Lambert-St Louis - IDA Idaho Falls Fanning Field

STLIDA

Lambert-St Louis

Fri 8/28

9:00 am-1:29 pm

1 stop5h 29m

Idaho Falls Fanning Field

Tue 9/1

2:25 pm-8:46 pm

1 stop5h 21m

$379
Quickest round-trip

St. LouisIdaho Falls

STL Lambert-St Louis - IDA Idaho Falls Fanning Field

STLIDA

Lambert-St Louis

Sun 9/6

9:00 am-1:29 pm

1 stop5h 29m

Idaho Falls Fanning Field

Wed 9/9

2:25 pm-8:38 pm

1 stop5h 13m

$384

Kansas CityIdaho Falls

MCI Kansas City - IDA Idaho Falls Fanning Field

MCIIDA

Kansas City

Tue 8/25

2:13 pm-10:32 pm

2 stops9h 19m

Idaho Falls Fanning Field

Sat 8/29

6:00 am-4:50 pm

2 stops9h 50m

$420

Kansas CityIdaho Falls

MCI Kansas City - IDA Idaho Falls Fanning Field

MCIIDA

Kansas City

Mon 11/9

2:59 pm-6:16 pm

1 stop4h 17m

Idaho Falls Fanning Field

Thu 11/12

1:11 pm-11:20 pm

2 stops9h 09m

$490

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 month to fly to Idaho Falls?

If you aren’t able to travel to Idaho Falls during the month of March, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $378.

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 33m

Direct flights

None
The fastest flight from Missouri to Idaho Falls takes 4h 33m
There are no direct flights from Missouri to Idaho Falls. There are no popular flight routes from Missouri to Idaho Falls.
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Frequently asked questions about flying from Missouri to Idaho Falls

  • 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 $278Free CancellationRating
7.4
10,108 reviews
Search United Airlines flights
DeltaPriceFrom $313Free CancellationRating
7.8
8,502 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

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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