$265+ Cheap flights from Missouri to Idaho Falls (IDA)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/2. Fares are subject to change and may not be available on all flights or dates of travel.
STL — IDA
Nov 17 — Nov 241
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Missouri to Idaho Falls with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Missouri to Idaho Falls
Cheapest
Best
Last-minute
One-way
Cheapest flights from Missouri to Idaho FallsExplore 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 18, 2026.
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 18, 2026.
This United Airlines deal was found by Cheapflights users on 10/16. 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.
Sun 11/155:45 am -
1 stop5h 08m
Sun 11/225:30 pm -
1 stop5h 22m
Deal found 10/16![United Airlines logo]()
$349
This Delta deal was found by Cheapflights users on 10/13. 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.
Fri 11/132:20 pm -
1 stop4h 57m
Mon 11/166:57 pm -
1 stop4h 43m
Deal found 10/13![Delta logo]()
$349
This Delta deal was found by Cheapflights users on 10/17. 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.
Sun 11/157:00 am -
1 stop6h 15m
Sun 11/226:57 pm -
1 stop4h 20m
Deal found 10/17![Delta logo]()
$373
This United Airlines deal was found by Cheapflights users on 10/15. 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.
Thu 10/295:45 am -
1 stop5h 08m
Mon 11/24:30 pm -
1 stop6h 22m
Deal found 10/15![United Airlines logo]()
$399
This Kiwi.com deal was found by Cheapflights users on 10/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/38:29 pm -
2 stops23h 39m
Sun 12/134:05 pm -
1 stop21h 37m
Deal found 10/15![Multiple Airlines logo]()
$434
This American Airlines deal was found by Cheapflights users on 10/16. 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.
Wed 10/287:03 am -
1 stop7h 06m
Sat 10/311:50 pm -
1 stop7h 52m
Deal found 10/16![American Airlines logo]()
$444
This United Airlines deal was found by Cheapflights users on 10/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/288:50 am -
1 stop7h 48m
Sun 11/12:35 pm -
1 stop5h 26m
Deal found 10/13![United Airlines logo]()
$445
This United Airlines deal was found by Cheapflights users on 10/17. 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 11/78:50 am -
1 stop7h 48m
Sat 11/142:35 pm -
1 stop5h 24m
Deal found 10/17![United Airlines logo]()
$459
This United Airlines deal was found by Cheapflights users on 10/14. 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.
Mon 11/235:45 am -
1 stop5h 08m
Mon 11/305:30 pm -
1 stop5h 17m
Deal found 10/14![United Airlines logo]()
$473
This Delta deal was found by Cheapflights users on 10/17. 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 10/245:00 pm -
1 stop6h 10m
Thu 10/296:00 am -
1 stop6h 32m
Deal found 10/17![Delta logo]()
$489
This United Airlines deal was found by Cheapflights users on 10/14. 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.
Wed 12/305:13 pm -
1 stop5h 06m
Fri 1/14:20 pm -
1 stop6h 24m
Deal found 10/14![United Airlines logo]()
$493
This Delta deal was found by Cheapflights users on 10/17. 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 10/245:00 pm -
1 stop6h 10m
Mon 10/266:56 pm -
2 stops13h 13m
Deal found 10/17![Delta logo]()
$494
Best flights from Missouri to Idaho FallsDiscover carefully curated flight deals from Missouri to Idaho Falls that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 18, 2026.
Discover carefully curated flight deals from Missouri to Idaho Falls that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 18, 2026.
This Kiwi.com deal was found by Cheapflights users on 10/18. 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 1/148:35 pm -
1 stop14h 36m
Sun 1/249:01 am -
1 stop9h 44m
Deal found 10/18![Allegiant Air logo]()
$334
This Delta deal was found by Cheapflights users on 10/13. 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.
Fri 11/132:20 pm -
1 stop4h 57m
Mon 11/166:57 pm -
1 stop4h 43m
Deal found 10/13![Delta logo]()
$349
This United Airlines deal was found by Cheapflights users on 10/15. 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.
Thu 1/78:50 am -
1 stop5h 38m
Mon 1/112:30 pm -
1 stop5h 05m
Deal found 10/15![United Airlines logo]()
$449
This Delta deal was found by Cheapflights users on 10/17. 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.
Sun 11/157:00 am -
1 stop6h 15m
Sun 11/226:57 pm -
1 stop4h 20m
Deal found 10/17![Delta logo]()
$373
This Delta deal was found by Cheapflights users on 10/18. 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 3/247:30 am -
1 stop5h 57m
Mon 3/296:45 pm -
1 stop4h 51m
Deal found 10/18![Delta logo]()
$374
This United Airlines deal was found by Cheapflights users on 10/15. 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.
Sat 1/95:05 pm -
1 stop5h 05m
Tue 1/122:30 pm -
1 stop5h 25m
Deal found 10/15![United Airlines logo]()
$459
This United Airlines deal was found by Cheapflights users on 10/14. 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.
Sat 2/64:30 pm -
1 stop5h 40m
Tue 2/92:30 pm -
1 stop5h 08m
Deal found 10/14![United Airlines logo]()
$459
This United Airlines deal was found by Cheapflights users on 10/16. 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.
Sat 10/319:00 am -
1 stop7h 38m
Wed 11/45:30 pm -
1 stop5h 22m
Deal found 10/16![United Airlines logo]()
$499
This United Airlines deal was found by Cheapflights users on 10/15. 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.
Fri 10/3011:31 am -
1 stop5h 07m
Tue 11/310:35 am -
1 stop4h 36m
Deal found 10/15![United Airlines logo]()
$499
Last-minute flights from Missouri to Idaho FallsDiscover last-minute flight deals from Missouri to Idaho Falls. Data last updated October 18, 2026 and is based on user searches.
Discover last-minute flight deals from Missouri to Idaho Falls. Data last updated October 18, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 10/17. 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 10/217:45 am -
1 stop5h 37m
Sun 10/256:56 pm -
1 stop4h 48m
Deal found 10/17![Delta logo]()
$499
This Alaska Airlines deal was found by Cheapflights users on 10/17. 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 10/246:02 am -
1 stop10h 18m
Wed 10/281:58 pm -
1 stop9h 01m
Deal found 10/17![Alaska Airlines logo]()
$489
This Delta deal was found by Cheapflights users on 10/17. 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 10/2412:00 pm -
2 stops11h 10m
Sun 10/256:56 pm -
1 stop4h 48m
Deal found 10/17![Delta logo]()
$494
This American Airlines deal was found by Cheapflights users on 10/16. 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.
Wed 10/287:03 am -
1 stop7h 06m
Sat 10/311:50 pm -
1 stop7h 52m
Deal found 10/16![American Airlines logo]()
$444
This United Airlines deal was found by Cheapflights users on 10/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/288:50 am -
1 stop7h 48m
Sun 11/12:35 pm -
1 stop5h 26m
Deal found 10/13![United Airlines logo]()
$445
This United Airlines deal was found by Cheapflights users on 10/15. 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.
Thu 10/295:45 am -
1 stop5h 08m
Mon 11/24:30 pm -
1 stop6h 22m
Deal found 10/15![United Airlines logo]()
$399
This United Airlines deal was found by Cheapflights users on 10/15. 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.
Fri 10/3011:31 am -
1 stop5h 07m
Tue 11/310:35 am -
1 stop4h 36m
Deal found 10/15![United Airlines logo]()
$499
This United Airlines deal was found by Cheapflights users on 10/17. 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 11/78:50 am -
1 stop7h 48m
Sat 11/142:35 pm -
1 stop5h 24m
Deal found 10/17![United Airlines logo]()
$459
This Delta deal was found by Cheapflights users on 10/13. 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.
Fri 11/132:20 pm -
1 stop4h 57m
Mon 11/166:57 pm -
1 stop4h 43m
Deal found 10/13![Delta logo]()
$349
This United Airlines deal was found by Cheapflights users on 10/16. 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.
Sun 11/155:45 am -
1 stop5h 08m
Sun 11/225:30 pm -
1 stop5h 22m
Deal found 10/16![United Airlines logo]()
$349
This Delta deal was found by Cheapflights users on 10/17. 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.
Sun 11/157:00 am -
1 stop6h 15m
Sun 11/226:57 pm -
1 stop4h 20m
Deal found 10/17![Delta logo]()
$373
This United Airlines deal was found by Cheapflights users on 10/14. 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.
Mon 11/235:45 am -
1 stop5h 08m
Mon 11/305:30 pm -
1 stop5h 17m
Deal found 10/14![United Airlines logo]()
$473
One-way flights from Missouri to Idaho FallsSearch for one-way flight options from Missouri to Idaho Falls. Find affordable one-way fares based on user searches. Data last updated October 18, 2026.
Search for one-way flight options from Missouri to Idaho Falls. Find affordable one-way fares based on user searches. Data last updated October 18, 2026.
This Alaska Airlines deal was found by Cheapflights users on 10/15. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/27:00 am -
1 stop9h 18m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/15![Alaska Airlines logo]()
$265
This United Airlines deal was found by Cheapflights users on 10/15. 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.
Mon 11/211:27 am -
2 stops10h 42m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/15![United Airlines logo]()
$403
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 October 18, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $349 (United Airlines) |
One-way from | $265 (Alaska Airlines) |
Popular in | April |
Cheapest in | November |
Average price | $519 |
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 7,457,451 searches. Data last updated October 18, 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
Cheapest round-trip
Quickest round-trip
Kansas CityIdaho Falls
MCI Kansas City - IDA Idaho Falls Fanning Field
MCIIDA
Kansas City
Mon 11/2
7:00 am-3:18 pm
1 stop9h 18m
Idaho Falls Fanning Field
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$265
SpringfieldIdaho Falls
SGF Springfield-Branson - IDA Idaho Falls Fanning Field
SGFIDA
Springfield-Branson
Thu 1/14
8:35 pm-10:11 am
1 stop14h 36m
Idaho Falls Fanning Field
Sun 1/24
9:01 am-7:45 pm
1 stop9h 44m
$334
St. LouisIdaho Falls
STL Lambert-St Louis - IDA Idaho Falls Fanning Field
STLIDA
Lambert-St Louis
Fri 11/13
2:20 pm-6:17 pm
1 stop4h 57m
Idaho Falls Fanning Field
Mon 11/16
6:57 pm-12:40 am
1 stop4h 43m
$349
Kansas CityIdaho Falls
MCI Kansas City - IDA Idaho Falls Fanning Field
MCIIDA
Kansas City
Sun 11/15
7:00 am-12:15 pm
1 stop6h 15m
Idaho Falls Fanning Field
Sun 11/22
6:57 pm-12:17 am
1 stop4h 20m
$373
St. LouisIdaho Falls
STL Lambert-St Louis - IDA Idaho Falls Fanning Field
STLIDA
Lambert-St Louis
Wed 3/24
7:30 am-12:27 pm
1 stop5h 57m
Idaho Falls Fanning Field
Mon 3/29
6:45 pm-12:36 am
1 stop4h 51m
$374
Kansas CityIdaho Falls
MCI Kansas City - IDA Idaho Falls Fanning Field
MCIIDA
Kansas City
Mon 11/2
11:27 am-9:09 pm
2 stops10h 42m
Idaho Falls Fanning Field
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$403
Kansas CityIdaho Falls
MCI Kansas City - IDA Idaho Falls Fanning Field
MCIIDA
Kansas City
Thu 1/7
8:50 am-1:28 pm
1 stop5h 38m
Idaho Falls Fanning Field
Mon 1/11
2:30 pm-8:35 pm
1 stop5h 05m
$449
SpringfieldIdaho Falls
SGF Springfield-Branson - IDA Idaho Falls Fanning Field
SGFIDA
Springfield-Branson
Sat 1/9
5:05 pm-9:10 pm
1 stop5h 05m
Idaho Falls Fanning Field
Tue 1/12
2:30 pm-8:55 pm
1 stop5h 25m
$459
St. LouisIdaho Falls
STL Lambert-St Louis - IDA Idaho Falls Fanning Field
STLIDA
Lambert-St Louis
Sat 2/6
4:30 pm-9:10 pm
1 stop5h 40m
Idaho Falls Fanning Field
Tue 2/9
2:30 pm-8:38 pm
1 stop5h 08m
$459
Kansas CityIdaho Falls
MCI Kansas City - IDA Idaho Falls Fanning Field
MCIIDA
Kansas City
Sat 10/31
9:00 am-3:38 pm
1 stop7h 38m
Idaho Falls Fanning Field
Wed 11/4
5:30 pm-11:52 pm
1 stop5h 22m
$499
Showing 1-10 of 11 resultsSorted by cheapest first
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.
MCI-IDA
STL-IDA
SGF-IDA
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
USMO-IDA
MCI-IDA
STL-IDA
SGF-IDA
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 April is currently the most expensive (average of $683). 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.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Idaho Falls flight routes
Other flight options
Popular flights
Top destinations
Alternative routes for Missouri to Idaho Falls
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Idaho Falls by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Missouri to Idaho Falls by cabin class
Find flights from Missouri to Idaho Falls, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to Idaho Falls
Explore flights to Idaho Falls departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on October 18, 2026.
Missouri and Idaho Falls flights
Browse other Missouri and Idaho Falls flight options. Last updated on October 18, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Missouri to Idaho Falls flights
Consider these flights traveling from Missouri to Idaho Falls.
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 7,457,451 searches. Data last updated October 18, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$295 | Average$482 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$313 | Average$471 | FlexibilityNo cancel fee | On-timeN/A |