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$154+ Cheap flights from Idaho Falls (IDA) to Missouri

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 11/19. Fares are subject to change and may not be available on all flights or dates of travel.
IDA — STL
nov. 29 — dic. 61
sáb. 11/29
sáb. 12/6
1 adult, Economy
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Find flight deals from Idaho Falls to Missouri

Cheapest flights from Idaho Falls to Missouri
Explore the most affordable flight options available from Idaho Falls to Missouri. Find the lowest fares from popular airlines and budget airlines, with prices last updated on octubre 30, 2025.

This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/271:52 pmIDA - STL
1 stop24h 16mMultiple Airlines
mié. 12/37:43 pmSTL - IDA
2 stops43h 53mMultiple Airlines
Deal found 10/30$270
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/271:52 pmIDA - STL
1 stop24h 16mMultiple Airlines
jue. 12/41:16 pmSTL - IDA
1 stop25h 00mMultiple Airlines
Deal found 10/30$273
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/312:19 pmIDA - STL
1 stop22h 53mMultiple Airlines
mié. 12/107:43 pmSTL - IDA
2 stops43h 53mMultiple Airlines
Deal found 10/29$281
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/710:56 pmIDA - STL
2 stops33h 11mMultiple Airlines
jue. 12/41:16 pmSTL - IDA
1 stop25h 00mMultiple Airlines
Deal found 10/30$335
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/2610:51 pmIDA - STL
1 stop21h 18mMultiple Airlines
mié. 12/37:43 pmSTL - IDA
2 stops43h 53mMultiple Airlines
Deal found 10/30$340
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/2610:51 pmIDA - STL
1 stop21h 18mMultiple Airlines
jue. 12/41:16 pmSTL - IDA
1 stop25h 00mMultiple Airlines
Deal found 10/30$342
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/35:07 pmIDA - STL
1 stop20h 20mAlaska Airlines
mié. 12/107:00 amSTL - IDA
1 stop10h 27mAlaska Airlines
Deal found 10/30$371
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/271:52 pmIDA - STL
1 stop24h 16mMultiple Airlines
lun. 12/13:53 pmSTL - IDA
1 stop22h 39mMultiple Airlines
Deal found 10/30$381
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.
mié. 12/37:06 pmIDA - STL
2 stops12h 18mDelta
mié. 12/106:15 amSTL - IDA
1 stop7h 22mDelta
Deal found 10/30$393
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/38:52 pmIDA - STL
2 stops11h 15mMultiple Airlines
jue. 12/41:16 pmSTL - IDA
1 stop25h 00mMultiple Airlines
Deal found 10/30$399
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/136:05 amIDA - MCI
1 stop6h 57mAlaska Airlines
lun. 11/177:00 amMCI - IDA
1 stop9h 13mAlaska Airlines
Deal found 10/28$400
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 12/66:05 amIDA - MCI
1 stop10h 22mAlaska Airlines
dom. 12/76:55 amMCI - IDA
1 stop18h 04mAlaska Airlines
Deal found 10/30$402

Cheap flight deals from Idaho Falls to Missouri

Keep the following information in mind while searching for Idaho Falls to Missouri flight deals. Data was last updated octubre 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$270
(Kiwi.com)

One-way from

$154
(Kiwi.com)

Popular in

January

Cheapest in

February

Average price

$510
Provider with most accurate pricing for Idaho Falls Fanning Field-Lambert-St Louis flight deals.
Search Deals
Provider most trusted by Cheapflights users for Idaho Falls Fanning Field-Lambert-St Louis flights.
Search Deals
From Idaho Falls Fanning Field to Missouri
Search Deals
One-way flight from Idaho Falls Fanning Field to Missouri
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($58 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($32 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 Idaho Falls to Missouri 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 octubre 30, 2025.
Use the filters below to find and compare flights from Idaho Falls to Missouri that are best for you.

Fly from

Idaho Falls

Fly to

Missouri

Route

Depart

Return

Price

Idaho FallsSt. Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

jue. 11/27

1:52 pm-3:08 pm

1 stop24h 16m

Lambert-St Louis

jue. 12/4

1:16 pm-7:26 pm

2 stops31h 10m

$302

Idaho FallsSpringfield

IDA - SGF

IDASGF

Idaho Falls Fanning Field

vie. 1/23

2:07 pm-9:19 pm

1 stop6h 12m

Springfield-Branson

mar. 1/27

8:00 am-1:37 pm

1 stop6h 37m

$339

Idaho FallsKansas City

IDA - MCI

IDAMCI

Idaho Falls Fanning Field

mar. 4/7

6:45 pm-12:25 am

1 stop4h 40m

Kansas City

mié. 4/8

6:40 am-12:31 pm

1 stop6h 51m

$350

Idaho FallsSt. Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

mar. 4/7

4:00 pm-11:55 pm

1 stop6h 55m

Lambert-St Louis

mié. 4/8

7:00 am-3:20 pm

1 stop9h 20m

$371

Idaho FallsSt. Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

mar. 4/7

4:00 pm-11:55 pm

1 stop6h 55m

Lambert-St Louis

mié. 4/8

7:00 am-3:20 pm

1 stop9h 20m

$371

Idaho FallsSt. Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

mié. 12/3

7:00 am-3:27 pm

1 stop7h 27m

Lambert-St Louis

mié. 12/10

7:00 am-1:27 pm

1 stop7h 27m

$371

Idaho FallsSt. Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

mié. 12/3

5:07 pm-2:27 pm

1 stop20h 20m

Lambert-St Louis

mié. 12/10

7:00 am-4:27 pm

1 stop10h 27m

$371

Idaho FallsSpringfield

IDA - SGF

IDASGF

Idaho Falls Fanning Field

vie. 1/23

2:07 pm-9:19 pm

1 stop6h 12m

Springfield-Branson

lun. 1/26

6:00 am-1:37 pm

1 stop8h 37m

$389

Idaho FallsSpringfield

IDA - SGF

IDASGF

Idaho Falls Fanning Field

jue. 1/22

2:07 pm-10:47 pm

1 stop7h 40m

Springfield-Branson

lun. 1/26

6:00 am-1:37 pm

1 stop8h 37m

$389

Idaho FallsSt. Louis

IDA - STL

IDASTL

Idaho Falls Fanning Field

mié. 12/3

7:06 pm-8:24 am

2 stops12h 18m

Lambert-St Louis

mié. 12/10

6:15 am-12:37 pm

1 stop7h 22m

$393

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 40 results
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Best time to book a flight from Idaho Falls to Missouri

Have a flexible travel schedule? Discover the best time to fly to Missouri from Idaho Falls 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 Idaho Falls to Missouri

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

Currently, March is the cheapest month in which you can book a flight from Idaho Falls to Missouri (average of $199). Flying from Idaho Falls to Missouri in January is currently the most expensive (average of $442). 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.

What is the cheapest time of day to fly from IDA to MO?

Find hourly flight availability from Idaho Falls to Missouri. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated octubre 30, 2025.

It’s optimal to fly from Idaho Falls to Missouri in the afternoon. By choosing this option you can save up to 25% on the cost of your flight, compared to a flight in the morning.

Reviews of airlines servicing Missouri

Get insights into the airlines that provide service to Missouri. 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 Missouri. Reviews last updated octubre 30, 2025.
See what other customers who have flown with Delta, United Airlines, and American Airlines from Idaho Falls to Missouri have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
7,998 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,998 reviews
Delta
7.9
Good
7,998 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
United Airlines
7.4
Good
8,998 reviews
Delta
7.9
Good
7,998 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
American Airlines
7.2
Good
11,035 reviews
Delta
7.9
Good
7,998 reviews

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

Related info for your journey

Find useful and relevant information for your journey from Idaho Falls to Missouri. 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 from for flights from Idaho Falls to Missouri?

    Most people fly from Idaho Falls Fanning Field (IDA) if they book a flight from Idaho Falls to Missouri. Idaho Falls Fanning Field is conveniently located just 3.8 mi from Idaho Falls’s city center.

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

    There are many flights that can get you from Idaho Falls to Missouri in 4h 40m. Fly via American Airlines, Delta, or Alaska Airlines to get the fastest option. Airlines will cover a distance of 942 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    The cheapest airlines for a one-way flight from Idaho Falls to Missouri are Alaska Airlines ($217), Delta ($226), and United Airlines ($226).

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

    Most travelers choose Idaho Falls Fanning Field - Lambert-St Louis, Idaho Falls Fanning Field - Kansas City or Idaho Falls Fanning Field - Springfield-Branson when deciding on the best route from Idaho Falls to Missouri.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Idaho Falls to Missouri 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 Idaho Falls to Missouri?

    Currently, March is the cheapest month in which you can book a flight from Idaho Falls to Missouri (average of $199). Flying from Idaho Falls to Missouri in January is currently the most expensive (average of $442). 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

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Alternative routes for Idaho Falls to Missouri

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from Idaho Falls to Missouri

Discover the top 3 airlines that operate flights from Idaho Falls to Missouri. 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 octubre 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$258Average$470FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$324Average$384FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$350Average$580FlexibilityNo cancel feeOn-time69%

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