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Idaho Falls

$165+ Cheap flights from Missouri to Idaho Falls (IDA)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/23. Fares are subject to change and may not be available on all flights or dates of travel.
STL — IDA
Aug 25 — Sep 11
Tue 8/25
Tue 9/1
1 adult, Economy
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Cheap flight deals from Missouri to Idaho Falls

Cheapest flights from Missouri to Idaho Falls
Explore the most affordable flight options available from Missouri to Idaho Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 26, 2026.

This Kiwi.com deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/229:12 pm
SGF
-
IDA
1 stop12h 50m
Allegiant Air
Mon 10/266:30 pm
IDA
-
SGF
1 stop18h 02m
Allegiant Air
Deal found 7/26$315
This Delta deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/207:00 am
MCI
-
IDA
1 stop4h 50m
Delta
Tue 8/257:00 pm
IDA
-
MCI
1 stop4h 13m
Delta
Deal found 7/22$329
This American Airlines deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/256:00 am
STL
-
IDA
1 stop8h 09m
American Airlines
Thu 8/272:20 pm
IDA
-
STL
1 stop7h 21m
American Airlines
Deal found 7/26$329
This Delta deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/217:00 am
MCI
-
IDA
1 stop4h 50m
Delta
Sat 8/296:00 am
IDA
-
MCI
2 stops8h 14m
Delta
Deal found 7/23$334
This Kiwi.com deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/19:17 pm
SGF
-
IDA
1 stop12h 45m
Allegiant Air
Mon 10/56:30 pm
IDA
-
SGF
1 stop18h 02m
Allegiant Air
Deal found 7/26$343
This Alaska Airlines deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/256:35 am
STL
-
IDA
1 stop9h 45m
Alaska Airlines
Sat 8/296:18 am
IDA
-
STL
1 stop6h 48m
Alaska Airlines
Deal found 7/21$344
This American Airlines deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/205:00 am
MCI
-
IDA
1 stop9h 09m
American Airlines
Tue 8/2512:06 pm
IDA
-
MCI
1 stop5h 28m
American Airlines
Deal found 7/26$350
This Delta deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/147:00 am
MCI
-
IDA
1 stop4h 50m
Delta
Sat 8/2211:35 am
IDA
-
MCI
2 stops11h 23m
Delta
Deal found 7/22$355
This United Airlines deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/54:40 pm
STL
-
IDA
1 stop5h 38m
United Airlines
Sat 9/124:04 pm
IDA
-
STL
1 stop6h 36m
United Airlines
Deal found 7/23$358
This Delta deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2812:18 pm
MCI
-
IDA
2 stops7h 02m
Delta
Tue 9/111:35 am
IDA
-
MCI
2 stops11h 23m
Delta
Deal found 7/26$360
This United Airlines deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/258:00 am
STL
-
IDA
2 stops10h 16m
United Airlines
Thu 8/272:25 pm
IDA
-
STL
1 stop5h 21m
United Airlines
Deal found 7/26$360
This KAYAK deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/242:32 pm
STL
-
IDA
1 stop4h 48m
Delta
Wed 8/267:00 pm
IDA
-
STL
1 stop4h 41m
Delta
Deal found 7/22$375

Find flight deals from Missouri to Idaho Falls

Keep the following information in mind while searching for Missouri to Idaho Falls flight deals. Data was last updated July 26, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$329
(Delta)

One-way from

$165
(United Airlines)

Popular in

November

Cheapest in

September

Average price

$517
Provider with most accurate pricing for Lambert-St Louis-Idaho Falls Fanning Field flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Idaho Falls Fanning Field flights.
Search Deals
From Missouri to Idaho Falls Fanning Field
Search Deals
One-way flight from Missouri to Idaho Falls Fanning Field
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($32 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($25 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated July 26, 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

Kansas CityIdaho Falls

MCI - IDA

MCIIDA

Kansas City

Fri 8/21

7:00 am-10:50 am

1 stop4h 50m

Idaho Falls Fanning Field

Sat 8/29

6:00 am-2:10 pm

1 stop7h 10m

$329

Kansas CityIdaho Falls

MCI - IDA

MCIIDA

Kansas City

Fri 8/21

9:14 am-3:23 pm

1 stop7h 09m

Idaho Falls Fanning Field

Sat 8/29

2:25 pm-8:39 pm

1 stop5h 14m

$329

Kansas CityIdaho Falls

MCI - IDA

MCIIDA

Kansas City

Fri 8/28

12:18 pm-6:20 pm

2 stops7h 02m

Idaho Falls Fanning Field

Tue 9/1

6:00 am-2:08 pm

1 stop7h 08m

$334

SpringfieldIdaho Falls

SGF - IDA

SGFIDA

Springfield-Branson

Thu 10/1

9:17 pm-9:02 am

1 stop12h 45m

Idaho Falls Fanning Field

Mon 10/5

6:30 pm-1:32 pm

1 stop18h 02m

$343

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Tue 8/25

6:35 am-3:20 pm

1 stop9h 45m

Idaho Falls Fanning Field

Sat 8/29

6:18 am-2:06 pm

1 stop6h 48m

$344

Kansas CityIdaho Falls

MCI - IDA

MCIIDA

Kansas City

Thu 8/20

5:00 am-1:09 pm

1 stop9h 09m

Idaho Falls Fanning Field

Tue 8/25

12:06 pm-6:34 pm

1 stop5h 28m

$350
Quickest round-trip

Kansas CityIdaho Falls

MCI - IDA

MCIIDA

Kansas City

Sun 9/20

6:00 am-9:51 am

1 stop4h 51m

Idaho Falls Fanning Field

Sat 9/26

5:51 pm-11:15 pm

1 stop4h 24m

$355

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Sat 9/5

4:40 pm-9:18 pm

1 stop5h 38m

Idaho Falls Fanning Field

Sat 9/12

4:04 pm-11:40 pm

1 stop6h 36m

$358

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Tue 8/25

8:00 am-5:16 pm

2 stops10h 16m

Idaho Falls Fanning Field

Thu 8/27

2:25 pm-8:46 pm

1 stop5h 21m

$360

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Mon 8/24

2:32 pm-6:20 pm

1 stop4h 48m

Idaho Falls Fanning Field

Wed 8/26

7:00 pm-12:41 am

1 stop4h 41m

$375

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/25

Showing 1-10 of 33 resultsSorted by cheapest first
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Best time to book a flight from Missouri to Idaho Falls

Have a flexible travel schedule? Discover the best time to fly to Idaho Falls from Missouri with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Missouri to Idaho Falls

What is the cheapest month to book a flight from Missouri to Idaho Falls?

Currently, March is the cheapest month in which you can book a flight from Missouri to Idaho Falls (average of $338). Flying from Missouri to Idaho Falls in November is currently the most expensive (average of $810). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost to fly round-trip from Missouri to Idaho Falls?

Airfare is below average for this route at the moment.
Missouri to Idaho Falls flights typically cost between $464 and $599 in August.
The cheapest round-trip price found within the last 5 days was $329 on American Airlines (Aug 25-Aug 27).

Related info for your journey

Find useful and relevant information for your journey from Missouri to Idaho Falls. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Idaho Falls from Missouri?

    Idaho Falls Fanning Field (IDA), located 3.8 mi from the city center, is the airport you fly into when you book flights from Missouri to Idaho Falls.

  • How long is the flight from Missouri to Idaho Falls?

    Departing from Missouri to Idaho Falls will take you 4h 50m. Airlines will cover a distance of 942 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the most popular routes from Missouri to Idaho Falls?

    The most popular route from Missouri to Idaho Falls is Kansas City - Idaho Falls Fanning Field. You may also consider Lambert-St Louis - Idaho Falls Fanning Field or Springfield-Branson - Idaho Falls Fanning Field.

  • Can I find deals for flights from Missouri to Idaho Falls that include hotel bookings?

    Yes. In addition to deals on Missouri to Idaho Falls flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Missouri to Idaho Falls?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Missouri to Idaho Falls.

  • Can I find deals for business class flights from Missouri to Idaho Falls?

    Yes. Cheapflights offers flight deals from Missouri to Idaho Falls by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Missouri to Idaho Falls?

    Currently, March is the cheapest month in which you can book a flight from Missouri to Idaho Falls (average of $338). Flying from Missouri to Idaho Falls in November is currently the most expensive (average of $810). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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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Top 2 airlines flying from Missouri to Idaho Falls

Discover the top 2 airlines that operate flights from Missouri to Idaho Falls. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 26, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$278Average$511FlexibilityNo cancel feeOn-time69%
DeltaCheapest$313Average$490FlexibilityNo cancel feeOn-timeN/A

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