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Idaho Falls

$149+ 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 9/16. Fares are subject to change and may not be available on all flights or dates of travel.
STL — IDA
Aug 6 — Aug 131
Wed 8/6
Wed 8/13
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 August 1, 2025.

Round-trip from

$298
(Alaska Airlines)

One-way from

$149
(Hawaiian Airlines)

Popular in

December

Cheapest in

September

Average price

$470
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. 7% potential increase in price ($43 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in August 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 August 1, 2025.

This Alaska Airlines deal was found by Cheapflights users on 7/30. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/273:35 pmSTL - IDA
1 stop8h 04mAlaska Airlines
Wed 10/16:13 amIDA - STL
1 stop7h 26mAlaska Airlines
Deal found 7/30$298
This Delta deal was found by Cheapflights users on 7/30. 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.
Tue 9/96:45 pmSTL - IDA
1 stop4h 42mDelta
Tue 9/166:51 pmIDA - STL
1 stop4h 47mDelta
Deal found 7/30$299
This Delta deal was found by Cheapflights users on 7/31. 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.
Wed 9/36:40 amMCI - IDA
1 stop4h 59mDelta
Tue 9/96:52 pmIDA - MCI
1 stop4h 07mDelta
Deal found 7/31$301
This American Airlines deal was found by Cheapflights users on 7/31. 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.
Sat 10/183:10 pmMCI - IDA
1 stop7h 38mAmerican Airlines
Tue 10/216:44 amIDA - MCI
1 stop6h 34mAmerican Airlines
Deal found 7/31$313
This American Airlines deal was found by Cheapflights users on 7/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/186:00 amSGF - IDA
1 stop7h 24mAmerican Airlines
Tue 10/2112:55 pmIDA - SGF
1 stop7h 31mAmerican Airlines
Deal found 7/30$340
This United Airlines deal was found by Cheapflights users on 7/31. 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 11/19:58 amMCI - IDA
2 stops8h 48mUnited Airlines
Sat 11/88:30 amIDA - MCI
1 stop6h 35mUnited Airlines
Deal found 7/31$355
This United Airlines deal was found by Cheapflights users on 7/31. 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 8/165:45 amSGF - IDA
1 stop4h 59mUnited Airlines
Wed 8/204:15 pmIDA - SGF
1 stop6h 27mUnited Airlines
Deal found 7/31$378
This United Airlines deal was found by Cheapflights users on 7/30. 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.
Wed 9/33:20 pmSTL - IDA
2 stops8h 28mUnited Airlines
Thu 9/115:56 pmIDA - STL
1 stop4h 57mUnited Airlines
Deal found 7/30$427
This Alaska Airlines deal was found by Cheapflights users on 7/31. 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 11/44:49 pmMCI - IDA
2 stops23h 24mAlaska Airlines
Tue 11/113:50 pmIDA - MCI
2 stops23h 04mAlaska Airlines
Deal found 7/31$453
This Mytrip deal was found by Cheapflights users on 7/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/710:30 amMCI - IDA
2 stops23h 33mMultiple Airlines
Sun 8/109:47 amIDA - MCI
2 stops26h 50mMultiple Airlines
Deal found 7/30$564

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 August 1, 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

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

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

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

SpringfieldIdaho Falls

SGF - IDA

SGFIDA

Springfield-Branson

Sat 10/18

6:00 am-12:24 pm

1 stop7h 24m

Idaho Falls Fanning Field

Tue 10/21

12:55 pm-9:26 pm

1 stop7h 31m

$340

Kansas CityIdaho Falls

MCI - IDA

MCIIDA

Kansas City

Sat 11/1

9:58 am-5:46 pm

2 stops8h 48m

Idaho Falls Fanning Field

Sat 11/8

8:30 am-4:05 pm

1 stop6h 35m

$355

SpringfieldIdaho Falls

SGF - IDA

SGFIDA

Springfield-Branson

Sat 8/16

5:45 am-9:44 am

1 stop4h 59m

Idaho Falls Fanning Field

Wed 8/20

4:15 pm-11:42 pm

1 stop6h 27m

$378

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Wed 9/3

3:20 pm-10:48 pm

2 stops8h 28m

Idaho Falls Fanning Field

Thu 9/11

5:56 pm-11:53 pm

1 stop4h 57m

$427

Kansas CityIdaho Falls

MCI - IDA

MCIIDA

Kansas City

Tue 11/4

4:49 pm-3:13 pm

2 stops23h 24m

Idaho Falls Fanning Field

Tue 11/11

3:50 pm-3:54 pm

2 stops23h 04m

$453

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Tue 9/16

3:35 pm-10:39 pm

1 stop8h 04m

$149

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/31

Showing 1-10 of 16 results
1
2

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.

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

Reviews of airlines servicing Idaho Falls

Get insights into the airlines that provide service to Idaho Falls. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Idaho Falls. Reviews last updated August 1, 2025.
Read reviews from past customers who have flown Alaska Airlines, Delta, and Hawaiian Airlines from Missouri to Idaho Falls. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Entertainment

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Entertainment

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,983 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Entertainment

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Hawaiian Airlines
7.8
Good
2,611 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Entertainment

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
United Airlines
7.4
Good
8,904 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Entertainment

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Entertainment

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

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.

  • What are the cheapest airlines to fly from Missouri to Idaho Falls one-way?

    To fly one-way, consider booking your trip with Hawaiian Airlines, which is currently one of the cheapest options available, starting at $149. Alaska Airlines flights start at $150 while deals on Delta start at $163 one-way.

  • 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, 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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Top 3 airlines flying from Missouri to Idaho Falls

Discover the top 3 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 August 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$236Average$591FlexibilityNo cancel feeOn-time69%
DeltaCheapest$273Average$431FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$305Average$796FlexibilityNo cancel feeOn-time71%

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