$123+ 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 8/12. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — STL
Jun 4 — Jun 111
Round-trip
1 adult, Economy
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Find cheap flights from Idaho to Missouri with Cheapflights
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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 May 5, 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 May 5, 2026.
This CheapOair deal was found by Cheapflights users on 5/1. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/281:25 pm
BOI
- STL
1 stop28h 28m
Frontier
Sat 7/47:38 pm
STL
- BOI
1 stop17h 51m
Frontier
Deal found 5/1![Frontier logo]()
$275
This Kiwi.com deal was found by Cheapflights users on 5/1. 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.
Fri 8/2812:28 pm
GEG
- MCI
1 stop22h 32m
Frontier
Tue 9/11:45 pm
MCI
- GEG
1 stop23h 48m
Frontier
Deal found 5/1![Frontier logo]()
$281
This Kiwi.com deal was found by Cheapflights users on 5/2. 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 6/41:33 pm
BOI
- MCI
1 stop23h 16m
Frontier
Sat 6/62:34 pm
MCI
- BOI
1 stop23h 04m
Frontier
Deal found 5/2![Frontier logo]()
$300
This Delta deal was found by Cheapflights users on 5/3. 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.
Tue 6/236:00 am
BOI
- MCI
1 stop7h 00m
Delta
Wed 7/19:13 am
MCI
- BOI
1 stop5h 38m
Delta
Deal found 5/3![Delta logo]()
$307
This United Airlines deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/305:46 pm
BOI
- MCI
1 stop4h 39m
United Airlines
Wed 6/36:00 am
MCI
- BOI
1 stop4h 45m
United Airlines
Deal found 4/30![United Airlines logo]()
$319
This Delta deal was found by Cheapflights users on 5/1. 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.
Thu 5/2812:27 pm
GEG
- SGF
1 stop7h 52m
Delta
Fri 6/126:00 am
SGF
- GEG
1 stop7h 36m
Delta
Deal found 5/1![Delta logo]()
$320
This Southwest deal was found by Cheapflights users on 5/4. 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 7/144:05 pm
BOI
- MCI
1 stop6h 30m
Southwest
Tue 8/46:55 am
MCI
- BOI
1 stop7h 45m
Southwest
Deal found 5/4![Southwest logo]()
$327
This Delta deal was found by Cheapflights users on 5/1. 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.
Tue 5/2612:27 pm
GEG
- SGF
1 stop7h 52m
Delta
Fri 6/126:00 am
SGF
- GEG
1 stop7h 36m
Delta
Deal found 5/1![Delta logo]()
$329
This American Airlines deal was found by Cheapflights users on 5/3. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/44:06 pm
BOI
- MCI
1 stop7h 19m
American Airlines
Sat 6/65:31 am
MCI
- BOI
1 stop6h 47m
American Airlines
Deal found 5/3![American Airlines logo]()
$331
This Kiwi.com deal was found by Cheapflights users on 5/1. 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 5/281:25 pm
BOI
- MCI
2 stops27h 04m
Frontier
Mon 6/12:34 pm
MCI
- BOI
1 stop22h 56m
Frontier
Deal found 5/1![Frontier logo]()
$332
This Kiwi.com deal was found by Cheapflights users on 5/1. 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 5/179:19 pm
GEG
- SGF
1 stop12h 12m
Multiple Airlines
Wed 6/32:49 pm
SGF
- GEG
2 stops27h 00m
Multiple Airlines
Deal found 5/1![Multiple Airlines logo]()
$333
This Delta deal was found by Cheapflights users on 5/1. 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.
Mon 5/255:35 am
GEG
- SGF
2 stops10h 29m
Delta
Fri 6/126:00 am
SGF
- GEG
1 stop7h 36m
Delta
Deal found 5/1![Delta logo]()
$334
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 May 5, 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 May 5, 2026.
This United Airlines deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/305:46 pm
BOI
- MCI
1 stop4h 39m
United Airlines
Wed 6/36:00 am
MCI
- BOI
1 stop4h 45m
United Airlines
Deal found 4/30![United Airlines logo]()
$319
This Delta deal was found by Cheapflights users on 5/3. 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 6/187:00 pm
IDA
- MCI
1 stop4h 18m
Delta
Thu 6/256:00 pm
MCI
- IDA
1 stop5h 31m
Delta
Deal found 5/3![Delta logo]()
$339
This Alaska Airlines deal was found by Cheapflights users on 5/4. 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.
Thu 8/276:18 am
IDA
- MCI
1 stop6h 34m
Alaska Airlines
Sun 8/302:46 pm
MCI
- IDA
1 stop23h 20m
Alaska Airlines
Deal found 5/4![Alaska Airlines logo]()
$339
This Southwest deal was found by Cheapflights users on 5/4. 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 6/25:10 am
GEG
- STL
1 stop6h 20m
Southwest
Sat 6/63:50 pm
STL
- GEG
2 stops8h 10m
Southwest
Deal found 5/4![Southwest logo]()
$357
This American Airlines deal was found by Cheapflights users on 5/3. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/43:12 pm
BOI
- STL
1 stop8h 04m
American Airlines
Tue 6/95:29 am
STL
- BOI
1 stop5h 59m
American Airlines
Deal found 5/3![American Airlines logo]()
$381
This Kiwi.com deal was found by Cheapflights users on 5/2. 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.
Fri 7/109:47 am
IDA
- SGF
1 stop9h 18m
Allegiant Air
Sun 7/121:31 pm
SGF
- IDA
1 stop20h 26m
Allegiant Air
Deal found 5/2![Allegiant Air logo]()
$565
This Delta deal was found by Cheapflights users on 5/3. 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.
Wed 5/275:35 am
GEG
- MCI
1 stop6h 23m
Delta
Sat 5/306:40 am
MCI
- GEG
1 stop7h 21m
Delta
Deal found 5/3![Delta logo]()
$352
This Alaska Airlines deal was found by Cheapflights users on 5/1. 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 9/86:18 am
IDA
- MCI
1 stop6h 39m
Alaska Airlines
Thu 9/172:51 pm
MCI
- IDA
1 stop23h 15m
Alaska Airlines
Deal found 5/1![Alaska Airlines logo]()
$379
This Delta deal was found by Cheapflights users on 5/1. 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.
Wed 5/274:59 pm
GEG
- MCI
1 stop5h 26m
Delta
Mon 6/15:45 pm
MCI
- GEG
1 stop7h 21m
Delta
Deal found 5/1![Delta logo]()
$357
This Southwest deal was found by Cheapflights users on 5/2. 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.
Wed 6/106:00 am
GEG
- MCI
2 stops7h 15m
Southwest
Tue 6/165:15 pm
MCI
- GEG
1 stop8h 50m
Southwest
Deal found 5/2![Southwest logo]()
$397
This American Airlines deal was found by Cheapflights users on 5/3. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/34:05 pm
BOI
- STL
1 stop6h 54m
American Airlines
Sun 6/75:29 am
STL
- BOI
1 stop6h 49m
American Airlines
Deal found 5/3![American Airlines logo]()
$412
This United Airlines deal was found by Cheapflights users on 5/1. 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.
Tue 5/192:31 pm
IDA
- STL
1 stop5h 12m
United Airlines
Tue 5/265:10 am
STL
- IDA
1 stop5h 40m
United Airlines
Deal found 5/1![United Airlines logo]()
$425
This Southwest deal was found by Cheapflights users on 5/3. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/272:25 pm
GEG
- MCI
1 stop6h 00m
Southwest
Sat 5/305:35 pm
MCI
- GEG
1 stop6h 40m
Southwest
Deal found 5/3![Southwest logo]()
$397
This Delta deal was found by Cheapflights users on 5/1. 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.
Mon 6/16:54 pm
IDA
- MCI
1 stop4h 31m
Delta
Thu 6/46:40 am
MCI
- IDA
1 stop5h 07m
Delta
Deal found 5/1![Delta logo]()
$367
This Alaska Airlines deal was found by Cheapflights users on 5/5. 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 8/256:18 am
IDA
- STL
1 stop6h 46m
Alaska Airlines
Sat 8/293:00 pm
STL
- IDA
1 stop8h 56m
Alaska Airlines
Deal found 5/5![Alaska Airlines logo]()
$419
This Southwest deal was found by Cheapflights users on 5/1. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/277:00 am
GEG
- MCI
1 stop6h 50m
Southwest
Mon 6/15:55 pm
MCI
- GEG
2 stops8h 40m
Southwest
Deal found 5/1![Southwest logo]()
$403
This United Airlines deal was found by Cheapflights users on 5/2. 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.
Tue 8/254:10 pm
IDA
- MCI
1 stop6h 15m
United Airlines
Sat 8/296:00 am
MCI
- IDA
1 stop4h 53m
United Airlines
Deal found 5/2![United Airlines logo]()
$450
This Delta deal was found by Cheapflights users on 5/3. 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.
Tue 6/235:30 am
BOI
- MCI
1 stop5h 19m
Delta
Thu 7/26:20 am
MCI
- BOI
1 stop5h 38m
Delta
Deal found 5/3![Delta logo]()
$373
This Alaska Airlines deal was found by Cheapflights users on 5/1. 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.
Thu 5/211:54 pm
IDA
- MCI
1 stop8h 55m
Alaska Airlines
Wed 5/275:52 pm
MCI
- IDA
1 stop20h 25m
Alaska Airlines
Deal found 5/1![Alaska Airlines logo]()
$419
This Southwest deal was found by Cheapflights users on 5/1. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/27:00 am
GEG
- STL
2 stops8h 55m
Southwest
Sun 6/77:35 pm
STL
- GEG
1 stop7h 10m
Southwest
Deal found 5/1![Southwest logo]()
$412
This Delta deal was found by Cheapflights users on 5/4. 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.
Wed 5/2011:35 am
JAC
- STL
1 stop6h 28m
Delta
Sun 5/244:00 pm
STL
- JAC
1 stop5h 15m
Delta
Deal found 5/4![Delta logo]()
$375
This Alaska Airlines deal was found by Cheapflights users on 5/3. 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.
Sat 9/125:09 am
GEG
- SGF
2 stops11h 08m
Alaska Airlines
Thu 9/1712:47 pm
SGF
- GEG
2 stops12h 27m
Alaska Airlines
Deal found 5/3![Alaska Airlines logo]()
$420
This United Airlines deal was found by Cheapflights users on 5/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/135:46 pm
BOI
- MCI
1 stop4h 39m
United Airlines
Fri 6/196:00 am
MCI
- BOI
1 stop6h 32m
United Airlines
Deal found 5/3![United Airlines logo]()
$467
This American Airlines deal was found by Cheapflights users on 5/4. 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 8/271:41 pm
IDA
- SGF
1 stop8h 04m
American Airlines
Sun 8/302:25 pm
SGF
- IDA
1 stop7h 55m
American Airlines
Deal found 5/4![American Airlines logo]()
$544
This Southwest deal was found by Cheapflights users on 5/1. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/32:00 pm
BOI
- STL
1 stop7h 00m
Southwest
Sun 6/75:35 pm
STL
- BOI
2 stops8h 45m
Southwest
Deal found 5/1![Southwest logo]()
$417
This United Airlines deal was found by Cheapflights users on 5/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/252:30 pm
IDA
- STL
1 stop5h 09m
United Airlines
Sat 8/295:10 am
STL
- IDA
1 stop5h 43m
United Airlines
Deal found 5/3![United Airlines logo]()
$471
This Delta deal was found by Cheapflights users on 5/1. 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.
Tue 6/167:00 am
GEG
- STL
1 stop6h 17m
Delta
Fri 6/195:36 pm
STL
- GEG
1 stop7h 31m
Delta
Deal found 5/1![Delta logo]()
$402
This Southwest deal was found by Cheapflights users on 5/2. 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 6/411:50 am
GEG
- STL
2 stops8h 05m
Southwest
Mon 6/87:45 pm
STL
- GEG
1 stop6h 45m
Southwest
Deal found 5/2![Southwest logo]()
$417
This Alaska Airlines deal was found by Cheapflights users on 5/3. 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 6/254:21 pm
BOI
- MCI
1 stop6h 38m
Alaska Airlines
Sat 6/275:50 pm
MCI
- BOI
1 stop6h 58m
Alaska Airlines
Deal found 5/3![Alaska Airlines logo]()
$472
This Delta deal was found by Cheapflights users on 5/3. 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.
Tue 6/167:00 pm
IDA
- MCI
1 stop4h 18m
Delta
Mon 6/222:55 pm
MCI
- IDA
1 stop4h 22m
Delta
Deal found 5/3![Delta logo]()
$403
Last-minute flights from Idaho to MissouriDiscover last-minute flight deals from Idaho to Missouri. Data last updated May 5, 2026 and is based on user searches.
Discover last-minute flight deals from Idaho to Missouri. Data last updated May 5, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 5/1. 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 5/179:19 pm
GEG
- SGF
1 stop12h 12m
Multiple Airlines
Wed 6/32:49 pm
SGF
- GEG
2 stops27h 00m
Multiple Airlines
Deal found 5/1![Multiple Airlines logo]()
$333
This Delta deal was found by Cheapflights users on 5/1. 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.
Mon 5/255:35 am
GEG
- SGF
2 stops10h 29m
Delta
Fri 6/126:00 am
SGF
- GEG
1 stop7h 36m
Delta
Deal found 5/1![Delta logo]()
$334
This Delta deal was found by Cheapflights users on 5/1. 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.
Tue 5/2612:27 pm
GEG
- SGF
1 stop7h 52m
Delta
Fri 6/126:00 am
SGF
- GEG
1 stop7h 36m
Delta
Deal found 5/1![Delta logo]()
$329
This Delta deal was found by Cheapflights users on 5/1. 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.
Thu 5/2812:27 pm
GEG
- SGF
1 stop7h 52m
Delta
Fri 6/126:00 am
SGF
- GEG
1 stop7h 36m
Delta
Deal found 5/1![Delta logo]()
$320
This Kiwi.com deal was found by Cheapflights users on 5/1. 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 5/281:25 pm
BOI
- MCI
2 stops27h 04m
Frontier
Mon 6/12:34 pm
MCI
- BOI
1 stop22h 56m
Frontier
Deal found 5/1![Frontier logo]()
$332
This United Airlines deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/305:46 pm
BOI
- MCI
1 stop4h 39m
United Airlines
Wed 6/36:00 am
MCI
- BOI
1 stop4h 45m
United Airlines
Deal found 4/30![United Airlines logo]()
$319
This Kiwi.com deal was found by Cheapflights users on 5/2. 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 6/41:33 pm
BOI
- MCI
1 stop23h 16m
Frontier
Sat 6/62:34 pm
MCI
- BOI
1 stop23h 04m
Frontier
Deal found 5/2![Frontier logo]()
$300
This American Airlines deal was found by Cheapflights users on 5/3. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/44:06 pm
BOI
- MCI
1 stop7h 19m
American Airlines
Sat 6/65:31 am
MCI
- BOI
1 stop6h 47m
American Airlines
Deal found 5/3![American Airlines logo]()
$331
This Delta deal was found by Cheapflights users on 5/3. 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.
Tue 6/167:00 pm
IDA
- MCI
1 stop4h 18m
Delta
Thu 6/256:00 pm
MCI
- IDA
1 stop5h 31m
Delta
Deal found 5/3![Delta logo]()
$339
This Delta deal was found by Cheapflights users on 5/3. 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.
Tue 6/236:00 am
BOI
- MCI
1 stop7h 00m
Delta
Tue 6/306:20 am
MCI
- BOI
1 stop5h 38m
Delta
Deal found 5/3![Delta logo]()
$307
This Kiwi.com deal was found by Cheapflights users on 5/3. 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.
Tue 6/231:25 pm
BOI
- MCI
2 stops26h 56m
Frontier
Mon 6/291:45 pm
MCI
- BOI
1 stop23h 45m
Frontier
Deal found 5/3![Frontier logo]()
$336
This CheapOair deal was found by Cheapflights users on 5/1. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/281:25 pm
BOI
- STL
1 stop28h 28m
Frontier
Sat 7/47:38 pm
STL
- BOI
1 stop17h 51m
Frontier
Deal found 5/1![Frontier logo]()
$275
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 May 5, 2026.
Search for one-way flight options from Idaho to Missouri. Find affordable one-way fares based on user searches. Data last updated May 5, 2026.
This Kiwi.com deal was found by Cheapflights users on 5/2. 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.
Wed 8/1212:34 pm
GEG
- MCI
1 stop22h 21m
Frontier
Deal found 5/2![Frontier logo]()
$123
This Kiwi.com deal was found by Cheapflights users on 5/1. 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 5/241:25 pm
BOI
- MCI
1 stop23h 24m
Frontier
Deal found 5/1![Frontier logo]()
$153
This Delta deal was found by Cheapflights users on 5/1. 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.
Tue 6/232:50 pm
BOI
- MCI
1 stop7h 40m
Delta
Deal found 5/1![Delta logo]()
$154
This Kiwi.com deal was found by Cheapflights users on 5/1. 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.
Fri 8/2812:28 pm
GEG
- MCI
1 stop22h 32m
Frontier
Deal found 5/1![Frontier logo]()
$163
This United Airlines deal was found by Cheapflights users on 5/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/65:46 pm
BOI
- MCI
1 stop4h 39m
United Airlines
Deal found 5/3![United Airlines logo]()
$166
This American Airlines deal was found by Cheapflights users on 5/4. 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 9/156:30 am
GEG
- STL
1 stop8h 45m
American Airlines
Deal found 5/4![American Airlines logo]()
$174
This Delta deal was found by Cheapflights users on 5/4. 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.
Wed 6/245:20 am
GEG
- MCI
1 stop6h 40m
Delta
Deal found 5/4![Delta logo]()
$174
This American Airlines deal was found by Cheapflights users on 5/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/304:05 pm
BOI
- STL
1 stop6h 53m
American Airlines
Deal found 5/1![American Airlines logo]()
$179
This Southwest deal was found by Cheapflights users on 5/2. 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.
Wed 8/125:45 am
GEG
- MCI
2 stops9h 15m
Southwest
Deal found 5/2![Southwest logo]()
$179
This United Airlines deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/225:53 pm
IDA
- STL
1 stop4h 57m
United Airlines
Deal found 5/5![United Airlines logo]()
$180
This Kiwi.com deal was found by Cheapflights users on 5/3. 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 6/111:25 pm
BOI
- MCI
1 stop22h 35m
Frontier
Deal found 5/3![Frontier logo]()
$181
This Delta deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/15:00 pm
GEG
- MCI
1 stop5h 20m
Delta
Deal found 5/5![Delta 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 May 5, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $275 (CheapOair) |
One-way from | $153 (Kiwi.com) |
Popular in | November |
Cheapest in | September |
Average price | $448 |
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 May 5, 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
BoiseKansas City
BOI - MCI
BOIMCI
Boise Air Term. Gowen Fld
Sat 5/30
5:46 pm-11:25 pm
1 stop4h 39m
Kansas City
Wed 6/3
6:00 am-9:45 am
1 stop4h 45m
$319
Idaho FallsKansas City
IDA - MCI
IDAMCI
Idaho Falls Fanning Field
Thu 6/18
7:00 pm-12:18 am
1 stop4h 18m
Kansas City
Thu 6/25
6:00 pm-10:31 pm
1 stop5h 31m
$339
Idaho FallsKansas City
IDA - MCI
IDAMCI
Idaho Falls Fanning Field
Thu 8/27
6:18 am-1:52 pm
1 stop6h 34m
Kansas City
Sun 8/30
2:46 pm-1:06 pm
1 stop23h 20m
$339
SpokaneKansas City
GEG - MCI
GEGMCI
Spokane
Wed 5/27
5:35 am-1:58 pm
1 stop6h 23m
Kansas City
Sat 5/30
6:40 am-12:01 pm
1 stop7h 21m
$352
SpokaneSt. Louis
GEG - STL
GEGSTL
Spokane
Tue 6/2
5:10 am-1:30 pm
1 stop6h 20m
Lambert-St Louis
Sat 6/6
3:50 pm-10:00 pm
2 stops8h 10m
$357
SpokaneKansas City
GEG - MCI
GEGMCI
Spokane
Wed 5/27
4:59 pm-12:25 am
1 stop5h 26m
Kansas City
Mon 6/1
5:45 pm-11:06 pm
1 stop7h 21m
$357
Idaho FallsKansas City
IDA - MCI
IDAMCI
Idaho Falls Fanning Field
Mon 6/1
6:54 pm-12:25 am
1 stop4h 31m
Kansas City
Thu 6/4
6:40 am-10:47 am
1 stop5h 07m
$367
BoiseKansas City
BOI - MCI
BOIMCI
Boise Air Term. Gowen Fld
Tue 6/23
5:30 am-11:49 am
1 stop5h 19m
Kansas City
Thu 7/2
6:20 am-10:58 am
1 stop5h 38m
$373
JacksonSt. Louis
JAC - STL
JACSTL
Jackson Hole
Wed 5/20
11:35 am-7:03 pm
1 stop6h 28m
Lambert-St Louis
Sun 5/24
4:00 pm-8:15 pm
1 stop5h 15m
$375
Idaho FallsKansas City
IDA - MCI
IDAMCI
Idaho Falls Fanning Field
Tue 9/8
6:18 am-1:57 pm
1 stop6h 39m
Kansas City
Thu 9/17
2:51 pm-1:06 pm
1 stop23h 15m
$379
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
BOI-MCI
GEG-SGF
IDA-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
BOI-MCI
GEG-SGF
IDA-MCI
How far ahead should I book a flight from Idaho to Missouri?
The best time to book flights from Idaho to Missouri is 22 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from Idaho to Missouri?
Currently, May is the cheapest month in which you can book a flight from Idaho to Missouri (average of $84). Flying from Idaho to Missouri in February is currently the most expensive (average of $295). 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 May 5, 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.
Entertainment
7.0
Crew
8.5
Comfort
7.8
Overall
7.9
Boarding
8.1
Food
7.1
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Entertainment
7.0
Crew
8.5
Comfort
7.8
Overall
7.9
Boarding
8.1
Food
7.1
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Entertainment
7.0
Crew
8.5
Comfort
7.8
Overall
7.9
Boarding
8.1
Food
7.1
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Entertainment
7.0
Crew
8.5
Comfort
7.8
Overall
7.9
Boarding
8.1
Food
7.1
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Entertainment
7.0
Crew
8.5
Comfort
7.8
Overall
7.9
Boarding
8.1
Food
7.1
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Entertainment
7.0
Crew
8.5
Comfort
7.8
Overall
7.9
Boarding
8.1
Food
7.1
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
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 May 5, 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 May 5, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$143 | Average$399 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$196 | Average$439 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$262 | Average$436 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$278 | Average$419 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$283 | Average$492 | FlexibilityNo cancel fee | On-time69% |