$122+ Cheap flights from Idaho 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 7/7. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — MCI
Jul 19 — Jul 261
Round-trip
1 adult, Economy
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Find cheap flights from Idaho to Missouri with Cheapflights
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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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Cheapest flights from Idaho to MissouriExplore the most affordable flight options available from Idaho to Missouri. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 19, 2026.
Explore the most affordable flight options available from Idaho to Missouri. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 19, 2026.
This CheapOair deal was found by Cheapflights users on 6/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/21:25 pm
BOI
- STL
1 stop28h 28m
Frontier
Wed 7/88:08 pm
STL
- BOI
1 stop17h 21m
Frontier
Deal found 6/16![Frontier logo]()
$306
This CheapOair deal was found by Cheapflights users on 6/17. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/71:24 pm
BOI
- STL
1 stop4h 59m
Frontier
Sat 7/118:08 pm
STL
- BOI
1 stop17h 21m
Frontier
Deal found 6/17![Frontier logo]()
$314
This CheapOair deal was found by Cheapflights users on 6/17. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/231:24 pm
BOI
- STL
1 stop4h 59m
Frontier
Mon 8/38:08 pm
STL
- BOI
1 stop17h 21m
Frontier
Deal found 6/17![Frontier logo]()
$318
This Delta deal was found by Cheapflights users on 6/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/226:00 am
IDA
- MCI
1 stop6h 57m
Delta
Tue 8/47:00 am
MCI
- IDA
1 stop4h 50m
Delta
Deal found 6/15![Delta logo]()
$319
This United Airlines deal was found by Cheapflights users on 6/17. 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.
Tue 8/185:44 pm
BOI
- SGF
1 stop4h 58m
United Airlines
Sat 8/225:05 pm
SGF
- BOI
1 stop6h 35m
United Airlines
Deal found 6/17![United Airlines logo]()
$329
This Delta deal was found by Cheapflights users on 6/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/191:59 pm
BOI
- SGF
1 stop7h 22m
Delta
Thu 8/273:20 pm
SGF
- BOI
2 stops9h 39m
Delta
Deal found 6/16![Delta logo]()
$334
This Alaska Airlines deal was found by Cheapflights users on 6/15. 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 12/76:15 am
IDA
- STL
1 stop7h 11m
Alaska Airlines
Tue 12/83:24 pm
STL
- IDA
1 stop8h 15m
Alaska Airlines
Deal found 6/15![Alaska Airlines logo]()
$344
This Alaska Airlines deal was found by Cheapflights users on 6/15. 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.
Tue 12/86:15 am
IDA
- MCI
1 stop7h 28m
Alaska Airlines
Sat 12/123:34 pm
MCI
- IDA
1 stop8h 05m
Alaska Airlines
Deal found 6/15![Alaska Airlines logo]()
$344
This United Airlines deal was found by Cheapflights users on 6/16. 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.
Wed 8/195:44 pm
BOI
- SGF
1 stop4h 58m
United Airlines
Wed 8/265:30 am
SGF
- BOI
1 stop5h 05m
United Airlines
Deal found 6/16![United Airlines logo]()
$347
This Alaska Airlines deal was found by Cheapflights users on 6/15. 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.
Tue 8/256:00 am
BOI
- MCI
1 stop5h 38m
Alaska Airlines
Wed 8/267:00 am
MCI
- BOI
1 stop6h 36m
Alaska Airlines
Deal found 6/15![Alaska Airlines logo]()
$347
This United Airlines deal was found by Cheapflights users on 6/14. 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.
Tue 9/2212:28 pm
BOI
- SGF
1 stop8h 34m
United Airlines
Sat 9/265:30 am
SGF
- BOI
1 stop5h 03m
United Airlines
Deal found 6/14![United Airlines logo]()
$350
This Southwest deal was found by Cheapflights users on 6/15. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/86:25 am
BOI
- MCI
1 stop8h 50m
Southwest
Tue 9/224:45 pm
MCI
- BOI
2 stops7h 25m
Southwest
Deal found 6/15![Southwest logo]()
$352
Best flights from Idaho to MissouriDiscover carefully curated flight deals from Idaho to Missouri that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 19, 2026.
Discover carefully curated flight deals from Idaho to Missouri that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 19, 2026.
This CheapOair deal was found by Cheapflights users on 6/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/21:25 pm
BOI
- STL
1 stop28h 28m
Frontier
Wed 7/88:08 pm
STL
- BOI
1 stop17h 21m
Frontier
Deal found 6/16![Frontier logo]()
$306
This Alaska Airlines deal was found by Cheapflights users on 6/14. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/271:46 pm
IDA
- MCI
1 stop9h 13m
Alaska Airlines
Sat 10/313:11 pm
MCI
- IDA
1 stop8h 43m
Alaska Airlines
Deal found 6/14![Alaska Airlines logo]()
$319
This Delta deal was found by Cheapflights users on 6/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/277:00 pm
IDA
- MCI
1 stop4h 13m
Delta
Tue 9/17:00 am
MCI
- IDA
1 stop4h 50m
Delta
Deal found 6/14![Delta logo]()
$319
This United Airlines deal was found by Cheapflights users on 6/15. 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.
Wed 9/2312:28 pm
BOI
- SGF
1 stop8h 34m
United Airlines
Sun 9/275:30 am
SGF
- BOI
1 stop5h 04m
United Airlines
Deal found 6/15![United Airlines logo]()
$329
This American Airlines deal was found by Cheapflights users on 6/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/83:16 pm
BOI
- MCI
1 stop8h 19m
American Airlines
Tue 9/225:28 am
MCI
- BOI
2 stops8h 54m
American Airlines
Deal found 6/15![American Airlines logo]()
$352
This Expedia deal was found by Cheapflights users on 6/16. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/41:24 pm
BOI
- STL
1 stop4h 59m
Multiple Airlines
Fri 8/75:37 pm
STL
- BOI
1 stop7h 11m
Multiple Airlines
Deal found 6/16![Multiple Airlines logo]()
$356
This Southwest deal was found by Cheapflights users on 6/15. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/116:15 am
GEG
- STL
1 stop9h 35m
Southwest
Thu 8/136:15 pm
STL
- GEG
1 stop6h 25m
Southwest
Deal found 6/15![Southwest logo]()
$388
This Kiwi.com deal was found by Cheapflights users on 6/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/44:03 pm
IDA
- SGF
1 stop19h 38m
Allegiant Air
Wed 7/811:56 am
SGF
- IDA
1 stop21h 59m
Allegiant Air
Deal found 6/17![Allegiant Air logo]()
$499
This CheapOair deal was found by Cheapflights users on 6/17. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/231:24 pm
BOI
- STL
1 stop4h 59m
Frontier
Mon 8/38:08 pm
STL
- BOI
1 stop17h 21m
Frontier
Deal found 6/17![Frontier logo]()
$318
This Delta deal was found by Cheapflights users on 6/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/191:59 pm
BOI
- SGF
1 stop7h 22m
Delta
Thu 8/273:20 pm
SGF
- BOI
2 stops9h 39m
Delta
Deal found 6/16![Delta logo]()
$334
This Alaska Airlines deal was found by Cheapflights users on 6/18. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/76:15 am
IDA
- STL
1 stop7h 11m
Alaska Airlines
Tue 12/83:24 pm
STL
- IDA
1 stop8h 15m
Alaska Airlines
Deal found 6/18![Alaska Airlines logo]()
$344
This United Airlines deal was found by Cheapflights users on 6/16. 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.
Wed 8/195:44 pm
BOI
- SGF
1 stop4h 58m
United Airlines
Wed 8/265:30 am
SGF
- BOI
1 stop5h 05m
United Airlines
Deal found 6/16![United Airlines logo]()
$347
This Alaska Airlines deal was found by Cheapflights users on 6/14. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/281:46 pm
IDA
- STL
1 stop9h 13m
Alaska Airlines
Sat 10/314:40 pm
STL
- IDA
1 stop7h 14m
Alaska Airlines
Deal found 6/14![Alaska Airlines logo]()
$344
This Delta deal was found by Cheapflights users on 6/18. 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.
Thu 8/277:00 pm
IDA
- MCI
1 stop4h 13m
Delta
Sun 8/307:00 am
MCI
- IDA
1 stop4h 50m
Delta
Deal found 6/18![Delta logo]()
$344
This Southwest deal was found by Cheapflights users on 6/19. 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 8/2211:20 am
GEG
- MCI
1 stop8h 40m
Southwest
Mon 8/247:00 pm
MCI
- GEG
1 stop5h 00m
Southwest
Deal found 6/19![Southwest logo]()
$388
This United Airlines deal was found by Cheapflights users on 6/14. 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.
Tue 7/284:13 pm
GEG
- MCI
1 stop5h 12m
United Airlines
Tue 8/49:10 am
MCI
- GEG
1 stop8h 01m
United Airlines
Deal found 6/14![United Airlines logo]()
$363
This Alaska Airlines deal was found by Cheapflights users on 6/18. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/86:15 am
IDA
- MCI
1 stop7h 28m
Alaska Airlines
Sat 12/123:34 pm
MCI
- IDA
1 stop8h 05m
Alaska Airlines
Deal found 6/18![Alaska Airlines logo]()
$344
This Delta deal was found by Cheapflights users on 6/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/16:05 pm
JAC
- STL
1 stop5h 38m
Delta
Sun 7/52:28 pm
STL
- JAC
1 stop6h 14m
Delta
Deal found 6/16![Delta logo]()
$359
This Southwest deal was found by Cheapflights users on 6/16. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/151:05 pm
BOI
- MCI
2 stops7h 35m
Southwest
Mon 7/209:15 pm
MCI
- BOI
1 stop5h 35m
Southwest
Deal found 6/16![Southwest logo]()
$398
This American Airlines deal was found by Cheapflights users on 6/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/253:12 pm
BOI
- STL
1 stop8h 03m
American Airlines
Sat 8/85:42 am
STL
- BOI
1 stop6h 34m
American Airlines
Deal found 6/14![American Airlines logo]()
$440
This United Airlines deal was found by Cheapflights users on 6/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/304:05 pm
IDA
- MCI
1 stop6h 39m
United Airlines
Mon 10/56:00 am
MCI
- IDA
1 stop4h 53m
United Airlines
Deal found 6/18![United Airlines logo]()
$376
This Alaska Airlines deal was found by Cheapflights users on 6/14. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/256:00 am
BOI
- MCI
1 stop5h 38m
Alaska Airlines
Wed 8/267:00 am
MCI
- BOI
1 stop6h 36m
Alaska Airlines
Deal found 6/14![Alaska Airlines logo]()
$347
This Delta deal was found by Cheapflights users on 6/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/225:20 am
GEG
- MCI
1 stop6h 37m
Delta
Wed 7/295:42 pm
MCI
- GEG
1 stop7h 24m
Delta
Deal found 6/14![Delta logo]()
$363
This American Airlines deal was found by Cheapflights users on 6/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/111:52 pm
BOI
- STL
2 stops9h 35m
American Airlines
Mon 9/147:21 am
STL
- BOI
1 stop8h 10m
American Airlines
Deal found 6/14![American Airlines logo]()
$445
This Southwest deal was found by Cheapflights users on 6/16. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/66:25 am
BOI
- MCI
2 stops7h 50m
Southwest
Fri 10/96:45 am
MCI
- BOI
2 stops11h 40m
Southwest
Deal found 6/16![Southwest logo]()
$413
This United Airlines deal was found by Cheapflights users on 6/16. 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.
Thu 7/94:23 pm
JAC
- STL
1 stop6h 34m
United Airlines
Wed 7/155:10 am
STL
- JAC
1 stop5h 24m
United Airlines
Deal found 6/16![United Airlines logo]()
$392
This Alaska Airlines deal was found by Cheapflights users on 6/14. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/255:12 am
GEG
- MCI
1 stop5h 26m
Alaska Airlines
Wed 8/267:00 am
MCI
- GEG
1 stop7h 31m
Alaska Airlines
Deal found 6/14![Alaska Airlines logo]()
$363
This United Airlines deal was found by Cheapflights users on 6/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/315:46 pm
BOI
- MCI
1 stop4h 39m
United Airlines
Tue 8/46:00 am
MCI
- BOI
1 stop4h 53m
United Airlines
Deal found 6/18![United Airlines logo]()
$397
This Delta deal was found by Cheapflights users on 6/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/126:00 am
BOI
- MCI
1 stop7h 08m
Delta
Fri 8/145:40 pm
MCI
- BOI
1 stop7h 19m
Delta
Deal found 6/14![Delta logo]()
$397
This Southwest deal was found by Cheapflights users on 6/14. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/35:10 pm
GEG
- STL
1 stop6h 45m
Southwest
Sat 8/88:30 am
STL
- GEG
1 stop6h 30m
Southwest
Deal found 6/14![Southwest logo]()
$440
Last-minute flights from Idaho to MissouriDiscover last-minute flight deals from Idaho to Missouri. Data last updated June 19, 2026 and is based on user searches.
Discover last-minute flight deals from Idaho to Missouri. Data last updated June 19, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 6/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/16:05 pm
JAC
- STL
1 stop5h 38m
Delta
Sun 7/52:28 pm
STL
- JAC
1 stop6h 14m
Delta
Deal found 6/16![Delta logo]()
$359
This CheapOair deal was found by Cheapflights users on 6/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/21:25 pm
BOI
- STL
1 stop28h 28m
Frontier
Wed 7/88:08 pm
STL
- BOI
1 stop17h 21m
Frontier
Deal found 6/16![Frontier logo]()
$306
This American Airlines deal was found by Cheapflights users on 6/18. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/33:10 pm
BOI
- MCI
1 stop8h 07m
American Airlines
Sat 7/45:31 am
MCI
- BOI
1 stop6h 48m
American Airlines
Deal found 6/18![American Airlines logo]()
$347
This CheapOair deal was found by Cheapflights users on 6/17. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/71:24 pm
BOI
- STL
1 stop4h 59m
Frontier
Sat 7/118:08 pm
STL
- BOI
1 stop17h 21m
Frontier
Deal found 6/17![Frontier logo]()
$314
This United Airlines deal was found by Cheapflights users on 6/17. 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.
Tue 7/145:54 pm
IDA
- STL
1 stop5h 03m
United Airlines
Tue 7/215:10 am
STL
- IDA
1 stop5h 40m
United Airlines
Deal found 6/17![United Airlines logo]()
$354
This Booking.com deal was found by Cheapflights users on 6/17. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/154:27 pm
BOI
- STL
1 stop6h 32m
Multiple Airlines
Wed 7/228:08 pm
STL
- BOI
1 stop17h 21m
Multiple Airlines
Deal found 6/17![Multiple Airlines logo]()
$358
This Kiwi.com deal was found by Cheapflights users on 6/15. 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.
Mon 7/2010:47 pm
IDA
- MCI
2 stops41h 23m
Multiple Airlines
Thu 8/64:32 pm
MCI
- IDA
1 stop24h 33m
Multiple Airlines
Deal found 6/15![Multiple Airlines logo]()
$360
This Delta deal was found by Cheapflights users on 6/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/226:00 am
IDA
- MCI
1 stop6h 57m
Delta
Tue 8/47:00 am
MCI
- IDA
1 stop4h 50m
Delta
Deal found 6/15![Delta logo]()
$319
This Delta deal was found by Cheapflights users on 6/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/227:00 pm
IDA
- MCI
1 stop4h 13m
Delta
Wed 8/56:01 pm
MCI
- IDA
1 stop5h 31m
Delta
Deal found 6/16![Delta logo]()
$344
This Delta deal was found by Cheapflights users on 6/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/226:00 am
IDA
- MCI
1 stop6h 57m
Delta
Thu 8/67:00 am
MCI
- IDA
1 stop4h 50m
Delta
Deal found 6/15![Delta logo]()
$365
This CheapOair deal was found by Cheapflights users on 6/17. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/231:24 pm
BOI
- STL
1 stop4h 59m
Frontier
Mon 8/38:08 pm
STL
- BOI
1 stop17h 21m
Frontier
Deal found 6/17![Frontier logo]()
$318
This Delta deal was found by Cheapflights users on 6/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/285:20 am
GEG
- MCI
1 stop6h 37m
Delta
Wed 8/56:01 pm
MCI
- GEG
1 stop7h 25m
Delta
Deal found 6/16![Delta logo]()
$363
One-way flights from Idaho to MissouriSearch for one-way flight options from Idaho to Missouri. Find affordable one-way fares based on user searches. Data last updated June 19, 2026.
Search for one-way flight options from Idaho to Missouri. Find affordable one-way fares based on user searches. Data last updated June 19, 2026.
This Frontier deal was found by Cheapflights users on 6/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/71:24 pm
BOI
- STL
1 stop4h 59m
Frontier
Deal found 6/15![Frontier logo]()
$122
This Kiwi.com deal was found by Cheapflights users on 6/15. 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 8/2010:12 am
GEG
- MCI
1 stop24h 43m
Multiple Airlines
Deal found 6/15![Multiple Airlines logo]()
$133
This Expedia deal was found by Cheapflights users on 6/17. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/211:24 pm
BOI
- STL
1 stop4h 59m
Frontier
Deal found 6/17![Frontier logo]()
$134
This Mytrip deal was found by Cheapflights users on 6/17. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/301:24 pm
BOI
- MCI
1 stop22h 36m
Frontier
Deal found 6/17![Frontier logo]()
$144
This Kiwi.com deal was found by Cheapflights users on 6/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/71:24 pm
BOI
- MCI
1 stop22h 36m
Frontier
Deal found 6/14![Frontier logo]()
$151
This Kiwi.com deal was found by Cheapflights users on 6/18. 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 8/69:14 pm
GEG
- STL
1 stop19h 01m
Multiple Airlines
Deal found 6/18![Multiple Airlines logo]()
$152
This Frontier deal was found by Cheapflights users on 6/17. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/161:24 pm
BOI
- STL
1 stop4h 59m
Frontier
Deal found 6/17![Frontier logo]()
$154
This Booking.com deal was found by Cheapflights users on 6/17. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/81:04 pm
BOI
- MCI
1 stop23h 18m
Frontier
Deal found 6/17![Frontier logo]()
$156
This Mytrip deal was found by Cheapflights users on 6/17. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/112:31 pm
GEG
- STL
1 stop28h 22m
Frontier
Deal found 6/17![Frontier logo]()
$165
This United Airlines deal was found by Cheapflights users on 6/14. 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 7/86:30 am
BOI
- MCI
1 stop5h 08m
United Airlines
Deal found 6/14![United Airlines logo]()
$174
This Southwest deal was found by Cheapflights users on 6/15. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/225:30 am
BOI
- MCI
2 stops9h 45m
Southwest
Deal found 6/15![Southwest logo]()
$179
This Southwest deal was found by Cheapflights users on 6/14. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/153:00 pm
BOI
- STL
1 stop5h 55m
Southwest
Deal found 6/14![Southwest logo]()
$182
Find flight deals from Idaho to Missouri
Keep the following information in mind while searching for Idaho to Missouri flight deals. Data was last updated June 19, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $306 (CheapOair) |
One-way from | $122 (Frontier) |
Popular in | March |
Cheapest in | September |
Average price | $500 |
Cheapflights Fare Finder
Customize your flight search to find flights from Idaho 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 June 19, 2026.
Use the filters below to find and compare flights from Idaho to Missouri that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
BoiseSt. Louis
BOI - STL
BOISTL
Boise Air Term. Gowen Fld
Thu 7/2
1:25 pm-6:53 pm
1 stop28h 28m
Lambert-St Louis
Wed 7/8
8:08 pm-12:29 pm
1 stop17h 21m
$306
BoiseSt. Louis
BOI - STL
BOISTL
Boise Air Term. Gowen Fld
Thu 7/23
1:24 pm-7:23 pm
1 stop4h 59m
Lambert-St Louis
Mon 8/3
8:08 pm-12:29 pm
1 stop17h 21m
$318
Idaho FallsKansas City
IDA - MCI
IDAMCI
Idaho Falls Fanning Field
Tue 10/27
1:46 pm-11:59 pm
1 stop9h 13m
Kansas City
Sat 10/31
3:11 pm-10:54 pm
1 stop8h 43m
$319
Quickest round-trip
Idaho FallsKansas City
IDA - MCI
IDAMCI
Idaho Falls Fanning Field
Thu 8/27
7:00 pm-12:13 am
1 stop4h 13m
Kansas City
Tue 9/1
7:00 am-10:50 am
1 stop4h 50m
$319
BoiseSpringfield
BOI - SGF
BOISGF
Boise Air Term. Gowen Fld
Wed 9/23
12:28 pm-10:02 pm
1 stop8h 34m
Springfield-Branson
Sun 9/27
5:30 am-9:34 am
1 stop5h 04m
$329
BoiseSpringfield
BOI - SGF
BOISGF
Boise Air Term. Gowen Fld
Wed 8/19
1:59 pm-10:21 pm
1 stop7h 22m
Springfield-Branson
Thu 8/27
3:20 pm-11:59 pm
2 stops9h 39m
$334
Idaho FallsSt. Louis
IDA - STL
IDASTL
Idaho Falls Fanning Field
Mon 12/7
6:15 am-2:26 pm
1 stop7h 11m
Lambert-St Louis
Tue 12/8
3:24 pm-10:39 pm
1 stop8h 15m
$344
Idaho FallsSt. Louis
IDA - STL
IDASTL
Idaho Falls Fanning Field
Wed 10/28
1:46 pm-11:59 pm
1 stop9h 13m
Lambert-St Louis
Sat 10/31
4:40 pm-10:54 pm
1 stop7h 14m
$344
Idaho FallsKansas City
IDA - MCI
IDAMCI
Idaho Falls Fanning Field
Thu 8/27
7:00 pm-12:13 am
1 stop4h 13m
Kansas City
Sun 8/30
7:00 am-10:50 am
1 stop4h 50m
$344
Idaho FallsKansas City
IDA - MCI
IDAMCI
Idaho Falls Fanning Field
Tue 12/8
6:15 am-2:43 pm
1 stop7h 28m
Kansas City
Sat 12/12
3:34 pm-10:39 pm
1 stop8h 05m
$344
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Idaho to Missouri
Have a flexible travel schedule? Discover the best time to fly to Missouri from Idaho with our price prediction graph.
BOI-STL
IDA-MCI
BOI-SGF
BOI-MCI
GEG-STL
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 to Missouri
USID-USMO
BOI-STL
IDA-MCI
BOI-SGF
BOI-MCI
What is the cheapest month to book a flight from Idaho to Missouri?
Currently, October is the cheapest month in which you can book a flight from Idaho to Missouri (average of $133). Flying from Idaho to Missouri in May is currently the most expensive (average of $351). 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 Idaho to Missouri?
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 June 19, 2026.
See what other customers who have flown with Alaska Airlines,Southwest, andDelta from Idaho to Missouri have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.1
Crew
8.5
Overall
7.9
Entertainment
7.0
Comfort
7.8
Boarding
8.1
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Food
7.1
Crew
8.5
Overall
7.9
Entertainment
7.0
Comfort
7.8
Boarding
8.1
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Food
7.1
Crew
8.5
Overall
7.9
Entertainment
7.0
Comfort
7.8
Boarding
8.1
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Food
7.1
Crew
8.5
Overall
7.9
Entertainment
7.0
Comfort
7.8
Boarding
8.1
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Food
7.1
Crew
8.5
Overall
7.9
Entertainment
7.0
Comfort
7.8
Boarding
8.1
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Food
7.1
Crew
8.5
Overall
7.9
Entertainment
7.0
Comfort
7.8
Boarding
8.1
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Related info for your journey
Find useful and relevant information for your journey from Idaho to Missouri. 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.
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Alternative routes for Idaho to Missouri
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Missouri by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Idaho to Missouri by cabin class
Find flights from Idaho to Missouri, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Idaho and Missouri flights
Browse other Idaho and Missouri flight options. Last updated on June 19, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Find a return flight route from Missouri
Find the right flight back to Idaho after your stay in Missouri
Idaho to Missouri flights
Consider these flights traveling from Idaho to Missouri.
Top 5 airlines flying from Idaho to Missouri
Discover the top 5 airlines that operate flights from Idaho 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 June 19, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$150 | Average$417 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$196 | Average$440 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$262 | Average$448 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$283 | Average$500 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$331 | Average$454 | FlexibilityNo cancel fee | On-time71% |