$150+ Cheap flights from Missouri to Idaho
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 9/23. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BOI
Sep 4 — Sep 111
Round-trip
1 adult, Economy
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Find cheap flights from Missouri to Idaho 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
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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
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Cheapest flights from Missouri to IdahoExplore the most affordable flight options available from Missouri to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 5, 2026.
Explore the most affordable flight options available from Missouri to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 5, 2026.
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/51:38 pm -
1 stop22h 51m
Mon 9/142:50 pm -
2 stops27h 47m
Deal found 7/31![Frontier logo]()
$233
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.
Thu 8/276:00 am -
1 stop4h 35m
Sun 8/306:15 am -
1 stop7h 18m
Deal found 7/31![United Airlines logo]()
$277
This Frontier deal was found by Cheapflights users on 8/4. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/77:58 pm -
1 stop17h 31m
Mon 9/142:50 pm -
1 stop19h 42m
Deal found 8/4![Frontier logo]()
$285
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1012:17 pm -
1 stop26h 38m
Thu 9/172:50 pm -
1 stop19h 37m
Deal found 7/31![Frontier logo]()
$294
This Expedia deal was found by Cheapflights users on 8/1. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/177:00 am -
1 stop6h 35m
Mon 9/212:50 pm -
1 stop5h 55m
Deal found 8/1![Multiple Airlines logo]()
$316
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/259:57 pm -
1 stop22h 42m
Fri 10/307:07 pm -
1 stop14h 35m
Deal found 7/31![Allegiant Air logo]()
$321
This Kiwi.com deal was found by Cheapflights users on 8/2. 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 9/1010:30 pm -
1 stop16h 25m
Mon 9/142:50 pm -
2 stops27h 47m
Deal found 8/2![Frontier logo]()
$322
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.
Sun 8/305:13 pm -
1 stop5h 33m
Sun 9/65:00 am -
1 stop5h 37m
Deal found 7/31![United Airlines logo]()
$323
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.
Sun 8/305:30 am -
2 stops10h 39m
Sun 9/62:27 pm -
1 stop8h 08m
Deal found 7/31![American Airlines logo]()
$328
This Alaska Airlines deal was found by Cheapflights users on 8/4. 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 10/313:17 pm -
1 stop8h 42m
Tue 11/31:53 pm -
1 stop9h 06m
Deal found 8/4![Alaska Airlines logo]()
$329
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.
Tue 8/258:00 am -
1 stop7h 35m
Thu 8/277:00 pm -
1 stop4h 41m
Deal found 7/31![Delta logo]()
$329
This Kiwi.com deal was found by Cheapflights users on 8/1. 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 9/1710:30 pm -
1 stop16h 25m
Mon 9/212:50 pm -
2 stops27h 47m
Deal found 8/1![Frontier logo]()
$329
Best flights from Missouri to IdahoDiscover carefully curated flight deals from Missouri to Idaho that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 5, 2026.
Discover carefully curated flight deals from Missouri to Idaho that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 5, 2026.
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1012:17 pm -
1 stop26h 38m
Thu 9/172:50 pm -
1 stop19h 37m
Deal found 7/31![Frontier logo]()
$294
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.
Thu 8/271:43 pm -
2 stops8h 41m
Sun 8/305:00 am -
1 stop4h 51m
Deal found 7/31![United Airlines logo]()
$307
This Expedia deal was found by Cheapflights users on 8/2. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/156:29 am -
1 stop9h 51m
Tue 9/223:57 pm -
1 stop24h 13m
Deal found 8/2![Alaska Airlines logo]()
$329
This Orbitz 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/257:00 am -
1 stop6h 35m
Mon 9/282:50 pm -
1 stop5h 55m
Deal found 7/31![Multiple Airlines logo]()
$338
This Southwest deal was found by Cheapflights users on 8/2. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/277:00 pm -
1 stop6h 15m
Wed 9/21:55 pm -
1 stop7h 15m
Deal found 8/2![Southwest logo]()
$340
This Delta deal was found by Cheapflights users on 8/3. 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.
Thu 8/277:15 am -
1 stop6h 53m
Wed 9/25:30 am -
1 stop6h 38m
Deal found 8/3![Delta logo]()
$345
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.
Thu 11/265:20 am -
1 stop9h 32m
Wed 12/21:25 pm -
1 stop6h 49m
Deal found 7/31![American Airlines logo]()
$370
This United Airlines deal was found by Cheapflights users on 8/4. 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 9/69:14 am -
1 stop5h 15m
Sat 9/124:04 pm -
1 stop6h 26m
Deal found 8/4![United Airlines logo]()
$329
This Alaska Airlines deal was found by Cheapflights users on 8/1. 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 8/257:00 am -
1 stop6h 36m
Tue 9/17:20 am -
2 stops15h 39m
Deal found 8/1![Alaska Airlines logo]()
$335
This Southwest deal was found by Cheapflights users on 8/4. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/284:55 pm -
1 stop7h 05m
Mon 8/315:30 am -
1 stop8h 45m
Deal found 8/4![Southwest logo]()
$350
This Delta deal was found by Cheapflights users on 8/3. 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.
Thu 8/207:00 am -
1 stop4h 50m
Tue 8/257:00 pm -
1 stop4h 13m
Deal found 8/3![Delta logo]()
$354
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.
Tue 8/259:00 am -
1 stop5h 29m
Thu 8/274:04 pm -
1 stop6h 27m
Deal found 7/31![United Airlines logo]()
$329
This Alaska Airlines deal was found by Cheapflights users on 8/1. 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 8/227:00 am -
1 stop8h 22m
Wed 8/264:20 pm -
1 stop6h 39m
Deal found 8/1![Alaska Airlines logo]()
$347
This Southwest deal was found by Cheapflights users on 8/4. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/277:00 pm -
1 stop6h 15m
Tue 9/17:00 am -
2 stops8h 35m
Deal found 8/4![Southwest logo]()
$352
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.
Thu 8/275:30 am -
2 stops10h 39m
Wed 9/25:20 am -
1 stop6h 10m
Deal found 7/31![American Airlines logo]()
$395
This Delta deal was found by Cheapflights users on 8/2. 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 10/36:06 am -
2 stops12h 15m
Wed 10/71:00 pm -
1 stop7h 19m
Deal found 8/2![Delta logo]()
$365
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.
Thu 10/295:02 pm -
1 stop6h 09m
Sun 11/11:49 pm -
1 stop5h 12m
Deal found 7/31![United Airlines logo]()
$339
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.
Fri 9/112:53 pm -
1 stop23h 31m
Sat 9/123:57 pm -
1 stop19h 41m
Deal found 7/31![Alaska Airlines logo]()
$354
This Delta deal was found by Cheapflights users on 8/1. 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 10/236:00 am -
1 stop7h 50m
Mon 10/2610:50 pm -
1 stop10h 03m
Deal found 8/1![Delta logo]()
$369
This American Airlines deal was found by Cheapflights users on 8/4. 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.
Tue 8/252:26 pm -
1 stop8h 16m
Mon 8/3112:44 pm -
1 stop5h 59m
Deal found 8/4![American Airlines logo]()
$409
This Southwest deal was found by Cheapflights users on 8/2. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/306:00 am -
2 stops8h 20m
Tue 11/311:40 am -
2 stops8h 35m
Deal found 8/2![Southwest logo]()
$381
This United Airlines deal was found by Cheapflights users on 8/2. 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 8/1911:32 am -
2 stops8h 52m
Sun 8/235:00 am -
1 stop4h 51m
Deal found 8/2![United Airlines logo]()
$352
This Alaska Airlines deal was found by Cheapflights users on 8/3. 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 9/246:08 pm -
1 stop20h 16m
Tue 9/293:57 pm -
1 stop24h 13m
Deal found 8/3![Alaska Airlines logo]()
$354
This Delta deal was found by Cheapflights users on 8/1. 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 10/236:00 am -
1 stop7h 50m
Sun 10/2510:50 pm -
1 stop10h 03m
Deal found 8/1![Delta logo]()
$369
This American Airlines deal was found by Cheapflights users on 8/4. 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.
Thu 9/247:27 am -
1 stop8h 04m
Tue 9/296:30 am -
1 stop6h 14m
Deal found 8/4![American Airlines logo]()
$420
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.
Fri 10/29:00 am -
1 stop7h 24m
Sat 10/34:05 pm -
1 stop6h 39m
Deal found 7/31![United Airlines logo]()
$358
This Alaska Airlines deal was found by Cheapflights users on 8/2. 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 11/77:00 am -
1 stop9h 17m
Tue 11/106:04 am -
1 stop7h 11m
Deal found 8/2![Alaska Airlines logo]()
$379
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 8/155:30 am -
2 stops10h 39m
Wed 8/192:27 pm -
1 stop8h 08m
Deal found 7/31![American Airlines logo]()
$422
This Delta deal was found by Cheapflights users on 8/4. 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 8/227:00 am -
1 stop4h 50m
Sat 8/296:00 am -
2 stops9h 50m
Deal found 8/4![Delta logo]()
$384
This Southwest deal was found by Cheapflights users on 8/4. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/226:30 pm -
1 stop6h 00m
Wed 9/307:30 am -
1 stop8h 50m
Deal found 8/4![Southwest logo]()
$423
Last-minute flights from Missouri to IdahoDiscover last-minute flight deals from Missouri to Idaho. Data last updated August 5, 2026 and is based on user searches.
Discover last-minute flight deals from Missouri to Idaho. Data last updated August 5, 2026 and is based on user searches.
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.
Sat 8/223:03 pm -
1 stop4h 17m
Sat 8/296:00 am -
1 stop7h 10m
Deal found 7/31![Delta logo]()
$329
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.
Tue 8/259:00 am -
1 stop5h 29m
Thu 8/274:04 pm -
1 stop6h 27m
Deal found 7/31![United Airlines logo]()
$329
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.
Thu 8/276:00 am -
1 stop4h 35m
Sun 8/306:15 am -
1 stop7h 18m
Deal found 7/31![United Airlines logo]()
$277
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.
Sun 8/305:13 pm -
1 stop5h 33m
Sun 9/65:00 am -
1 stop5h 37m
Deal found 7/31![United Airlines logo]()
$323
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.
Sun 8/305:30 am -
2 stops10h 39m
Sun 9/62:27 pm -
1 stop8h 08m
Deal found 7/31![American Airlines logo]()
$328
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/51:38 pm -
1 stop22h 51m
Mon 9/142:50 pm -
2 stops27h 47m
Deal found 7/31![Frontier logo]()
$233
This Frontier deal was found by Cheapflights users on 8/4. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/77:58 pm -
1 stop17h 31m
Mon 9/142:50 pm -
1 stop19h 42m
Deal found 8/4![Frontier logo]()
$285
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1012:17 pm -
1 stop26h 38m
Thu 9/172:50 pm -
1 stop19h 37m
Deal found 7/31![Frontier logo]()
$294
This Kiwi.com deal was found by Cheapflights users on 8/2. 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 9/1010:30 pm -
1 stop16h 25m
Mon 9/142:50 pm -
2 stops27h 47m
Deal found 8/2![Frontier logo]()
$322
This Expedia deal was found by Cheapflights users on 8/1. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/177:00 am -
1 stop6h 35m
Mon 9/212:50 pm -
1 stop5h 55m
Deal found 8/1![Multiple Airlines logo]()
$316
This Kiwi.com deal was found by Cheapflights users on 8/1. 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 9/1710:30 pm -
1 stop16h 25m
Mon 9/212:50 pm -
2 stops27h 47m
Deal found 8/1![Frontier logo]()
$329
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.
Thu 9/246:29 am -
1 stop7h 06m
Tue 9/297:00 am -
2 stops9h 10m
Deal found 7/31![Alaska Airlines logo]()
$331
One-way flights from Missouri to IdahoSearch for one-way flight options from Missouri to Idaho. Find affordable one-way fares based on user searches. Data last updated August 5, 2026.
Search for one-way flight options from Missouri to Idaho. Find affordable one-way fares based on user searches. Data last updated August 5, 2026.
This CheapOair deal was found by Cheapflights users on 8/4. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2312:17 pm -
1 stop26h 38m
Deal found 8/4![Frontier logo]()
$150
This Kiwi.com deal was found by Cheapflights users on 8/1. 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.
Sun 9/2712:27 pm -
1 stop26h 28m
Deal found 8/1![Frontier logo]()
$157
This Kiwi.com deal was found by Cheapflights users on 8/4. 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.
Fri 9/46:17 pm -
2 stops42h 12m
Deal found 8/4![Frontier logo]()
$162
This Kiwi.com deal was found by Cheapflights users on 8/3. 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 8/134:32 pm -
1 stop24h 33m
Deal found 8/3![Multiple Airlines logo]()
$182
This Kiwi.com deal was found by Cheapflights users on 8/1. 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.
Sun 10/119:57 pm -
1 stop21h 57m
Deal found 8/1![Allegiant Air logo]()
$184
This Delta deal was found by Cheapflights users on 8/4. 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 9/125:00 pm -
1 stop6h 55m
Deal found 8/4![Delta logo]()
$187
This Delta deal was found by Cheapflights users on 8/1. 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 9/125:00 pm -
1 stop6h 47m
Deal found 8/1![Delta logo]()
$187
This Kiwi.com deal was found by Cheapflights users on 8/1. 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.
Sat 9/128:10 pm -
2 stops42h 45m
Deal found 8/1![Frontier logo]()
$189
This Alaska Airlines deal was found by Cheapflights users on 8/4. 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 10/63:17 pm -
1 stop8h 42m
Deal found 8/4![Alaska Airlines logo]()
$190
This Trip.com deal was found by Cheapflights users on 8/4. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/101:45 pm -
1 stop23h 44m
Deal found 8/4![Frontier logo]()
$191
This Southwest deal was found by Cheapflights users on 8/4. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/122:05 pm -
2 stops8h 55m
Deal found 8/4![Southwest logo]()
$192
This United Airlines deal was found by Cheapflights users on 8/1. 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 9/128:30 am -
2 stops10h 28m
Deal found 8/1![United Airlines logo]()
$192
Find flight deals from Missouri to Idaho
Keep the following information in mind while searching for Missouri to Idaho flight deals. Data was last updated August 5, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $233 (Kiwi.com) |
One-way from | $150 (CheapOair) |
Popular in | February |
Cheapest in | September |
Average price | $396 |
Cheapflights Fare Finder
Customize your flight search to find flights from Missouri to Idaho 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 5, 2026.
Use the filters below to find and compare flights from Missouri to Idaho that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisBoise
STL - BOI
STLBOI
Lambert-St Louis
Thu 9/10
12:17 pm-1:55 pm
1 stop26h 38m
Boise Air Term. Gowen Fld
Thu 9/17
2:50 pm-11:27 am
1 stop19h 37m
$294
Kansas CityBoise
MCI - BOI
MCIBOI
Kansas City
Thu 8/27
1:43 pm-9:24 pm
2 stops8h 41m
Boise Air Term. Gowen Fld
Sun 8/30
5:00 am-10:51 am
1 stop4h 51m
$307
St. LouisIdaho Falls
STL - IDA
STLIDA
Lambert-St Louis
Tue 9/15
6:29 am-3:20 pm
1 stop9h 51m
Idaho Falls Fanning Field
Tue 9/22
3:57 pm-5:10 pm
1 stop24h 13m
$329
Kansas CityIdaho Falls
MCI - IDA
MCIIDA
Kansas City
Sun 9/6
9:14 am-1:29 pm
1 stop5h 15m
Idaho Falls Fanning Field
Sat 9/12
4:04 pm-11:30 pm
1 stop6h 26m
$329
St. LouisIdaho Falls
STL - IDA
STLIDA
Lambert-St Louis
Tue 8/25
9:00 am-1:29 pm
1 stop5h 29m
Idaho Falls Fanning Field
Thu 8/27
4:04 pm-11:31 pm
1 stop6h 27m
$329
Kansas CityBoise
MCI - BOI
MCIBOI
Kansas City
Tue 8/25
7:00 am-12:36 pm
1 stop6h 36m
Boise Air Term. Gowen Fld
Tue 9/1
7:20 am-11:59 pm
2 stops15h 39m
$335
Kansas CityBoise
MCI - BOI
MCIBOI
Kansas City
Fri 9/25
7:00 am-12:35 pm
1 stop6h 35m
Boise Air Term. Gowen Fld
Mon 9/28
2:50 pm-9:45 pm
1 stop5h 55m
$338
SpringfieldSpokane
SGF - GEG
SGFGEG
Springfield-Branson
Thu 10/29
5:02 pm-9:11 pm
1 stop6h 09m
Spokane
Sun 11/1
1:49 pm-9:01 pm
1 stop5h 12m
$339
Kansas CitySpokane
MCI - GEG
MCIGEG
Kansas City
Thu 8/27
7:00 pm-11:15 pm
1 stop6h 15m
Spokane
Wed 9/2
1:55 pm-11:10 pm
1 stop7h 15m
$340
Kansas CitySpokane
MCI - GEG
MCIGEG
Kansas City
Thu 8/27
7:15 am-12:08 pm
1 stop6h 53m
Spokane
Wed 9/2
5:30 am-2:08 pm
1 stop6h 38m
$345
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Missouri to Idaho
Have a flexible travel schedule? Discover the best time to fly to Idaho from Missouri with our price prediction graph.
MCI-BOI
STL-BOI
SGF-GEG
MCI-GEG
MCI-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
USMO-USID
MCI-BOI
STL-BOI
SGF-GEG
MCI-GEG
What is the cheapest month to book a flight from Missouri to Idaho?
Currently, January is the cheapest month in which you can book a flight from Missouri to Idaho (average of $385). Flying from Missouri to Idaho in February is currently the most expensive (average of $566). 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?
Airfare is below average for this route at the moment.
Missouri to Idaho flights typically cost between $357 and $676 in September.The cheapest round-trip price found within the last 5 days was $285 on Frontier (Sep 7-Sep 14).
Reviews of airlines servicing Idaho
Get insights into the airlines that provide service to Idaho. 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. Reviews last updated August 5, 2026.
Get a feel of what it's like to fly with Southwest,Alaska Airlines, andDelta from Missouri to Idaho by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
8.0
Food
7.0
Boarding
8.1
Overall
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Comfort
8.0
Food
7.0
Boarding
8.1
Overall
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Comfort
8.0
Food
7.0
Boarding
8.1
Overall
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Comfort
8.0
Food
7.0
Boarding
8.1
Overall
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Comfort
8.0
Food
7.0
Boarding
8.1
Overall
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Comfort
8.0
Food
7.0
Boarding
8.1
Overall
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Related info for your journey
Find useful and relevant information for your journey from Missouri to Idaho. 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
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Alternative routes for Missouri to Idaho
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Idaho by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Missouri to Idaho by cabin class
Find flights from Missouri to Idaho, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Missouri and Idaho flights
Browse other Missouri and Idaho flight options. Last updated on August 5, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Find a return flight route from Idaho
Find the right flight back to Missouri after your stay in Idaho
Missouri to Idaho flights
Consider these flights traveling from Missouri to Idaho.
Top 5 airlines flying from Missouri to Idaho
Discover the top 5 airlines that operate flights from Missouri to Idaho. 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 5, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$186 | Average$404 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$186 | Average$429 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$232 | Average$441 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$267 | Average$478 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$321 | Average$491 | FlexibilityNo cancel fee | On-time63% |