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Idaho Falls

$211+ 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 12/19. Fares are subject to change and may not be available on all flights or dates of travel.
STL — IDA
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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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 October 30, 2025.

This Alaska Airlines deal was found by Cheapflights users on 10/29. 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.
Thu 11/137:00 amMCI - IDA
1 stop9h 13mAlaska Airlines
Mon 11/173:50 pmIDA - MCI
1 stop6h 56mAlaska Airlines
Deal found 10/29$435
This United Airlines deal was found by Cheapflights users on 10/28. 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.
Wed 11/125:11 pmMCI - IDA
1 stop6h 41mUnited Airlines
Sun 11/167:00 amIDA - MCI
1 stop4h 45mUnited Airlines
Deal found 10/28$442
This United Airlines deal was found by Cheapflights users on 10/29. 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.
Thu 11/135:07 pmSGF - IDA
1 stop6h 45mUnited Airlines
Mon 11/175:00 amIDA - SGF
1 stop6h 47mUnited Airlines
Deal found 10/29$452
This United Airlines deal was found by Cheapflights users on 10/29. 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.
Mon 11/246:00 amMCI - IDA
1 stop4h 48mUnited Airlines
Fri 11/284:15 pmIDA - MCI
1 stop19h 30mUnited Airlines
Deal found 10/29$524
This United Airlines deal was found by Cheapflights users on 10/29. 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.
Thu 11/139:05 amMCI - IDA
1 stop7h 11mUnited Airlines
Mon 11/175:00 amIDA - MCI
2 stops10h 02mUnited Airlines
Deal found 10/29$532
This Alaska Airlines deal was found by Cheapflights users on 10/29. 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 12/306:00 amMCI - IDA
1 stop19h 07mAlaska Airlines
Sat 1/36:00 amIDA - MCI
1 stop17h 18mAlaska Airlines
Deal found 10/29$533
This United Airlines deal was found by Cheapflights users on 10/29. 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 12/305:45 amMCI - IDA
1 stop5h 13mUnited Airlines
Sat 1/35:00 amIDA - MCI
2 stops8h 38mUnited Airlines
Deal found 10/29$538
This Alaska Airlines deal was found by Cheapflights users on 10/29. 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 11/117:00 amMCI - IDA
1 stop9h 13mAlaska Airlines
Tue 11/183:50 pmIDA - MCI
2 stops23h 04mAlaska Airlines
Deal found 10/29$562
This Delta deal was found by Cheapflights users on 10/30. 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.
Sat 11/296:34 amSTL - IDA
1 stop7h 01mDelta
Sat 12/66:00 amIDA - STL
1 stop6h 30mDelta
Deal found 10/30$758
This Delta deal was found by Cheapflights users on 10/30. 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.
Sat 11/16:50 amSTL - IDA
1 stop6h 43mDelta
Tue 11/46:00 amIDA - STL
1 stop6h 39mDelta
Deal found 10/30$761
This United Airlines deal was found by Cheapflights users on 10/30. 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 12/272:45 pmSTL - IDA
1 stop20h 13mUnited Airlines
Sat 1/35:00 amIDA - STL
2 stops10h 27mUnited Airlines
Deal found 10/30$883
This United Airlines deal was found by Cheapflights users on 10/30. 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 11/299:00 amSTL - IDA
1 stop7h 16mUnited Airlines
Sat 12/64:19 pmIDA - STL
3 stops46h 21mUnited Airlines
Deal found 10/30$1,053

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 October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$348
(Hawaiian Airlines)

One-way from

$211
(Delta)

Popular in

November

Cheapest in

January

Average price

$541
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. 10% potential increase in price ($56 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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 October 30, 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

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Tue 3/3

2:55 pm-10:38 pm

1 stop8h 43m

Idaho Falls Fanning Field

Wed 3/4

4:00 pm-11:56 pm

1 stop6h 56m

$371

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Tue 3/3

7:00 am-12:31 pm

1 stop6h 31m

Idaho Falls Fanning Field

Wed 3/4

6:45 pm-9:04 am

2 stops13h 19m

$416

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Thu 2/5

8:45 am-1:30 pm

1 stop5h 45m

Idaho Falls Fanning Field

Tue 2/10

10:51 am-10:58 pm

2 stops11h 07m

$426

Kansas CityIdaho Falls

MCI - IDA

MCIIDA

Kansas City

Thu 11/13

7:00 am-3:13 pm

1 stop9h 13m

Idaho Falls Fanning Field

Mon 11/17

3:50 pm-11:46 pm

1 stop6h 56m

$435

Kansas CityIdaho Falls

MCI - IDA

MCIIDA

Kansas City

Wed 11/12

5:11 pm-10:52 pm

1 stop6h 41m

Idaho Falls Fanning Field

Sun 11/16

7:00 am-12:45 pm

1 stop4h 45m

$442

SpringfieldIdaho Falls

SGF - IDA

SGFIDA

Springfield-Branson

Thu 11/13

5:07 pm-10:52 pm

1 stop6h 45m

Idaho Falls Fanning Field

Mon 11/17

5:00 am-12:47 pm

1 stop6h 47m

$452

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Wed 1/14

2:45 pm-9:14 pm

1 stop7h 29m

Idaho Falls Fanning Field

Mon 1/19

2:40 pm-8:58 pm

1 stop5h 18m

$461

Kansas CityIdaho Falls

MCI - IDA

MCIIDA

Kansas City

Mon 11/24

6:00 am-9:48 am

1 stop4h 48m

Idaho Falls Fanning Field

Fri 11/28

4:15 pm-12:45 pm

1 stop19h 30m

$524

Kansas CityIdaho Falls

MCI - IDA

MCIIDA

Kansas City

Thu 11/13

9:05 am-3:16 pm

1 stop7h 11m

Idaho Falls Fanning Field

Mon 11/17

5:00 am-4:02 pm

2 stops10h 02m

$532

Kansas CityIdaho Falls

MCI - IDA

MCIIDA

Kansas City

Tue 12/30

6:00 am-12:07 am

1 stop19h 07m

Idaho Falls Fanning Field

Sat 1/3

6:00 am-12:18 am

1 stop17h 18m

$533

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/30

Showing 1-10 of 21 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, March is the cheapest month in which you can book a flight from Missouri to Idaho Falls (average of $169). Flying from Missouri to Idaho Falls in November is currently the most expensive (average of $343). 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 6h 31m. Airlines will cover a distance of 1171 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 $211. American Airlines flights start at $251 while deals on Alaska Airlines start at $277 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, March is the cheapest month in which you can book a flight from Missouri to Idaho Falls (average of $169). Flying from Missouri to Idaho Falls in November is currently the most expensive (average of $343). 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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$192Average$429FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$236Average$611FlexibilityNo cancel feeOn-time69%

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