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Idaho Falls

$160+ 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 10/16. Fares are subject to change and may not be available on all flights or dates of travel.
STL — IDA
Thg. 10 16 — Thg. 10 231
Th. 5 10/16
Th. 5 10/23
1 adult, Economy
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Cheap 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 Tháng Chín 16, 2025.

Round-trip from

$365
(American Airlines)

One-way from

$160
(Kiwi.com)

Popular in

October

Cheapest in

January

Average price

$453
From Missouri to Idaho Falls Fanning Field
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One-way flight from Missouri to Idaho Falls Fanning Field
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Highest demand for flights based on searches. 11% potential increase in price ($68 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($20 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 Tháng Chín 16, 2025.

This United Airlines deal was found by Cheapflights users on 9/15. 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.
Th. 7 10/115:18 pmMCI - IDA
1 stop4h 34mUnited Airlines
Th. 2 10/135:00 amIDA - MCI
1 stop4h 48mUnited Airlines
Deal found 9/15$426
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Th. 3 9/301:46 pmMCI - IDA
1 stop4h 32mUnited Airlines
Th. 7 10/410:50 amIDA - MCI
1 stop4h 26mUnited Airlines
Deal found 9/15$431
This Delta deal was found by Cheapflights users on 9/14. 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.
Th. 3 9/302:31 pmSTL - IDA
1 stop4h 40mDelta
Th. 4 10/16:51 pmIDA - STL
1 stop4h 47mDelta
Deal found 9/14$431
This United Airlines deal was found by Cheapflights users on 9/14. 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.
Th. 3 9/309:20 amSTL - IDA
2 stops8h 58mUnited Airlines
Th. 4 10/110:50 amIDA - STL
2 stops7h 52mUnited Airlines
Deal found 9/14$441
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Th. 7 11/19:00 amSTL - IDA
1 stop13h 03mUnited Airlines
Th. 3 11/42:45 pmIDA - STL
1 stop6h 09mUnited Airlines
Deal found 9/15$445
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Th. 7 11/225:10 pmMCI - IDA
1 stop6h 42mUnited Airlines
Th. 6 11/2810:50 amIDA - MCI
1 stop4h 15mUnited Airlines
Deal found 9/15$448
This United Airlines deal was found by Cheapflights users on 9/14. 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.
Th. 6 10/36:00 amMCI - IDA
1 stop4h 48mUnited Airlines
CN 10/55:56 pmIDA - MCI
1 stop4h 34mUnited Airlines
Deal found 9/14$451
This American Airlines deal was found by Cheapflights users on 9/16. 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.
Th. 5 10/167:01 amSTL - IDA
1 stop6h 40mAmerican Airlines
CN 10/1912:55 pmIDA - STL
1 stop5h 29mAmerican Airlines
Deal found 9/16$451
This Delta deal was found by Cheapflights users on 9/13. 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.
Th. 7 9/275:30 pmSTL - IDA
1 stop5h 55mDelta
Th. 4 10/16:51 pmIDA - STL
1 stop4h 47mDelta
Deal found 9/13$456
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Th. 3 9/304:50 pmSTL - IDA
1 stop5h 02mUnited Airlines
Th. 7 10/410:50 amIDA - STL
2 stops10h 45mUnited Airlines
Deal found 9/15$461
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Th. 5 10/165:15 amSTL - IDA
1 stop16h 37mUnited Airlines
CN 10/192:35 pmIDA - STL
1 stop5h 11mUnited Airlines
Deal found 9/15$462
This United Airlines deal was found by Cheapflights users on 9/16. 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.
Th. 4 10/16:00 amMCI - IDA
1 stop4h 48mUnited Airlines
CN 10/55:56 pmIDA - MCI
1 stop4h 34mUnited Airlines
Deal found 9/16$501

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 Tháng Chín 16, 2025.
Use the filters below to find and compare flights from Missouri to Idaho Falls that are best for you.

Fly from

Missouri

Fly to

Idaho Falls

Route

Depart

Return

Price

Kansas CityIdaho Falls

MCI - IDA

MCIIDA

Kansas City

CN 1/25

5:27 am-12:20 pm

1 stop7h 53m

Idaho Falls Fanning Field

CN 1/25

1:44 pm-8:08 pm

1 stop5h 24m

$365

Kansas CityIdaho Falls

MCI - IDA

MCIIDA

Kansas City

Th. 7 10/11

5:18 pm-8:52 pm

1 stop4h 34m

Idaho Falls Fanning Field

Th. 2 10/13

5:00 am-10:48 am

1 stop4h 48m

$426

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Th. 3 9/30

2:31 pm-6:11 pm

1 stop4h 40m

Idaho Falls Fanning Field

Th. 4 10/1

6:51 pm-12:38 am

1 stop4h 47m

$431

Kansas CityIdaho Falls

MCI - IDA

MCIIDA

Kansas City

Th. 3 9/30

1:46 pm-5:18 pm

1 stop4h 32m

Idaho Falls Fanning Field

Th. 7 10/4

10:50 am-4:16 pm

1 stop4h 26m

$431

Kansas CityIdaho Falls

MCI - IDA

MCIIDA

Kansas City

Th. 4 10/1

6:00 am-9:48 am

1 stop4h 48m

Idaho Falls Fanning Field

Th. 7 10/4

10:50 am-9:45 pm

2 stops9h 55m

$436

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Th. 6 1/2

2:41 pm-10:21 pm

1 stop8h 40m

Idaho Falls Fanning Field

Th. 3 1/6

5:35 am-1:42 pm

1 stop7h 07m

$445

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Th. 7 11/1

1:35 pm-9:03 pm

1 stop8h 28m

Idaho Falls Fanning Field

Th. 3 11/4

2:45 pm-9:54 pm

1 stop6h 09m

$445

Kansas CityIdaho Falls

MCI - IDA

MCIIDA

Kansas City

Th. 7 11/22

5:10 pm-10:52 pm

1 stop6h 42m

Idaho Falls Fanning Field

Th. 6 11/28

10:50 am-4:05 pm

1 stop4h 15m

$448

Kansas CityIdaho Falls

MCI - IDA

MCIIDA

Kansas City

Th. 6 10/3

6:00 am-9:48 am

1 stop4h 48m

Idaho Falls Fanning Field

CN 10/5

5:56 pm-11:30 pm

1 stop4h 34m

$451

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Th. 3 9/30

5:15 am-9:48 am

1 stop5h 33m

Idaho Falls Fanning Field

Th. 7 10/4

9:41 am-4:32 pm

1 stop5h 51m

$456

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 36 results
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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, October is the cheapest month in which you can book a flight from Missouri to Idaho Falls (average of $380). Flying from Missouri to Idaho Falls in December is currently the most expensive (average of $578). 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.

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 34m. 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 cheapest airlines to fly from Missouri to Idaho Falls one-way?

    To fly one-way, consider booking your trip with Delta, which is currently one of the cheapest options available, starting at $161. American Airlines flights start at $161 while deals on United Airlines start at $216 one-way.

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

    The most popular route from Missouri to Idaho Falls is Lambert-St Louis - Idaho Falls Fanning Field. You may also consider Springfield-Branson - Idaho Falls Fanning Field or Kansas City - 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, October is the cheapest month in which you can book a flight from Missouri to Idaho Falls (average of $380). Flying from Missouri to Idaho Falls in December is currently the most expensive (average of $578). 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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Alternative routes for Missouri to Idaho Falls

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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 Tháng Chín 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$192Average$431FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$236Average$593FlexibilityNo cancel feeOn-time69%

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