$115+ 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 4/18. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BOI
abr 16 — abr 231
Round-trip
1 adult, Economy
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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 março 17, 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 março 17, 2026.
This Gotogate deal was found by Cheapflights users on 3/14. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qua 4/88:16 pm
STL
- GEG
1 stop16h 05m
Frontier
dom 4/1211:06 am
GEG
- STL
1 stop20h 42m
Frontier
Deal found 3/14![Frontier logo]()
$239
This Frontier deal was found by Cheapflights users on 3/12. 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.
sáb 4/48:16 pm
STL
- BOI
1 stop15h 52m
Frontier
dom 4/1212:03 pm
BOI
- STL
1 stop20h 45m
Frontier
Deal found 3/12![Frontier logo]()
$240
This Booking.com deal was found by Cheapflights users on 3/12. 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.
sáb 4/252:51 pm
MCI
- GEG
1 stop21h 58m
Frontier
dom 5/311:44 am
GEG
- MCI
1 stop23h 46m
Frontier
Deal found 3/12![Frontier logo]()
$243
This Alaska Airlines deal was found by Cheapflights users on 3/12. 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.
ter 4/146:15 am
MCI
- BOI
1 stop14h 33m
Alaska Airlines
sáb 4/186:00 am
BOI
- MCI
1 stop16h 59m
Alaska Airlines
Deal found 3/12![Alaska Airlines logo]()
$267
This American Airlines deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ter 4/287:05 am
MCI
- GEG
1 stop7h 27m
American Airlines
sáb 5/21:22 pm
GEG
- MCI
1 stop8h 37m
American Airlines
Deal found 3/13![American Airlines logo]()
$277
This Alaska Airlines deal was found by Cheapflights users on 3/12. 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.
ter 4/73:50 pm
STL
- BOI
1 stop8h 07m
Alaska Airlines
qua 4/82:22 pm
BOI
- STL
1 stop8h 37m
Alaska Airlines
Deal found 3/12![Alaska Airlines logo]()
$277
This American Airlines deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb 4/115:00 am
MCI
- BOI
1 stop9h 03m
American Airlines
sáb 4/181:29 pm
BOI
- MCI
1 stop8h 28m
American Airlines
Deal found 3/13![American Airlines logo]()
$277
This Kiwi.com deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qua 5/202:34 pm
MCI
- BOI
1 stop22h 56m
Frontier
dom 5/241:25 pm
BOI
- MCI
1 stop23h 24m
Frontier
Deal found 3/13![Frontier logo]()
$279
This Southwest deal was found by Cheapflights users on 3/15. 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.
qua 5/65:30 am
STL
- BOI
2 stops8h 00m
Southwest
qua 5/134:05 pm
BOI
- STL
1 stop6h 10m
Southwest
Deal found 3/15![Southwest logo]()
$282
This United Airlines deal was found by Cheapflights users on 3/12. 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.
ter 4/146:00 am
MCI
- BOI
1 stop4h 54m
United Airlines
sáb 4/189:26 am
BOI
- MCI
2 stops10h 08m
United Airlines
Deal found 3/12![United Airlines logo]()
$282
This Expedia deal was found by Cheapflights users on 3/12. 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.
qua 5/67:00 am
MCI
- BOI
1 stop7h 52m
Alaska Airlines
dom 5/106:00 am
BOI
- MCI
1 stop7h 04m
Alaska Airlines
Deal found 3/12![Alaska Airlines logo]()
$286
This Alaska Airlines deal was found by Cheapflights users on 3/12. 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.
ter 4/287:00 am
MCI
- GEG
1 stop18h 11m
Alaska Airlines
sáb 5/22:45 pm
GEG
- MCI
1 stop7h 14m
Alaska Airlines
Deal found 3/12![Alaska Airlines logo]()
$287
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 março 17, 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 março 17, 2026.
This Alaska Airlines deal was found by Cheapflights users on 3/12. 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.
ter 4/73:50 pm
STL
- BOI
1 stop8h 07m
Alaska Airlines
qua 4/82:22 pm
BOI
- STL
1 stop8h 37m
Alaska Airlines
Deal found 3/12![Alaska Airlines logo]()
$277
This United Airlines deal was found by Cheapflights users on 3/12. 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.
ter 4/146:00 am
MCI
- BOI
1 stop4h 54m
United Airlines
sáb 4/189:26 am
BOI
- MCI
2 stops10h 08m
United Airlines
Deal found 3/12![United Airlines logo]()
$282
This Southwest deal was found by Cheapflights users on 3/12. 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.
ter 4/217:05 am
MCI
- BOI
2 stops8h 35m
Southwest
sáb 4/2511:00 am
BOI
- MCI
2 stops8h 35m
Southwest
Deal found 3/12![Southwest logo]()
$287
This Delta deal was found by Cheapflights users on 3/12. 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.
ter 4/76:12 pm
STL
- BOI
1 stop4h 59m
Delta
sáb 4/118:00 am
BOI
- STL
1 stop5h 43m
Delta
Deal found 3/12![Delta logo]()
$297
This American Airlines deal was found by Cheapflights users on 3/14. 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.
ter 4/215:19 am
SGF
- GEG
1 stop9h 13m
American Airlines
sáb 5/21:22 pm
GEG
- SGF
1 stop7h 16m
American Airlines
Deal found 3/14![American Airlines logo]()
$367
This Expedia deal was found by Cheapflights users on 3/12. 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.
qua 5/67:00 am
MCI
- BOI
1 stop7h 52m
Alaska Airlines
dom 5/106:00 am
BOI
- MCI
1 stop7h 04m
Alaska Airlines
Deal found 3/12![Alaska Airlines logo]()
$286
This Southwest deal was found by Cheapflights users on 3/12. 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.
ter 4/142:30 pm
MCI
- BOI
2 stops8h 40m
Southwest
sáb 4/1811:00 am
BOI
- MCI
2 stops8h 35m
Southwest
Deal found 3/12![Southwest logo]()
$287
This Alaska Airlines deal was found by Cheapflights users on 3/12. 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.
ter 4/287:00 am
MCI
- GEG
1 stop18h 11m
Alaska Airlines
sáb 5/22:45 pm
GEG
- MCI
1 stop7h 14m
Alaska Airlines
Deal found 3/12![Alaska Airlines logo]()
$287
This Delta deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb 4/114:02 pm
MCI
- BOI
1 stop6h 07m
Delta
sáb 4/188:59 am
BOI
- MCI
2 stops10h 57m
Delta
Deal found 3/13![Delta logo]()
$327
This Southwest deal was found by Cheapflights users on 3/16. 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.
qua 6/34:40 pm
MCI
- BOI
1 stop7h 50m
Southwest
seg 6/84:25 pm
BOI
- MCI
2 stops7h 05m
Southwest
Deal found 3/16![Southwest logo]()
$309
This United Airlines deal was found by Cheapflights users on 3/12. 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.
ter 4/2811:30 am
MCI
- GEG
2 stops11h 41m
United Airlines
sáb 5/25:00 am
GEG
- MCI
1 stop5h 43m
United Airlines
Deal found 3/12![United Airlines logo]()
$362
This Alaska Airlines deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qua 4/156:15 am
MCI
- BOI
1 stop8h 43m
Alaska Airlines
sáb 4/186:00 am
BOI
- MCI
1 stop6h 29m
Alaska Airlines
Deal found 3/13![Alaska Airlines logo]()
$316
This Delta deal was found by Cheapflights users on 3/16. 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.
qui 5/76:40 am
MCI
- JAC
1 stop6h 40m
Delta
dom 5/105:59 pm
JAC
- MCI
1 stop5h 26m
Delta
Deal found 3/16![Delta logo]()
$353
This United Airlines deal was found by Cheapflights users on 3/12. 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.
ter 4/2810:00 am
STL
- GEG
2 stops13h 11m
United Airlines
qua 4/291:46 pm
GEG
- STL
1 stop5h 08m
United Airlines
Deal found 3/12![United Airlines logo]()
$362
This Southwest deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb 4/183:55 pm
STL
- GEG
1 stop8h 35m
Southwest
seg 4/202:50 pm
GEG
- STL
1 stop7h 00m
Southwest
Deal found 3/13![Southwest logo]()
$331
This Delta deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sex 4/32:40 pm
MCI
- IDA
1 stop4h 35m
Delta
seg 4/66:55 pm
IDA
- MCI
1 stop4h 51m
Delta
Deal found 3/13![Delta logo]()
$354
This United Airlines deal was found by Cheapflights users on 3/12. 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.
ter 4/78:54 am
STL
- BOI
2 stops12h 19m
United Airlines
qua 4/85:00 am
BOI
- STL
1 stop7h 08m
United Airlines
Deal found 3/12![United Airlines logo]()
$362
This Southwest deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ter 6/26:30 pm
MCI
- BOI
1 stop6h 00m
Southwest
ter 6/94:05 pm
BOI
- MCI
1 stop6h 30m
Southwest
Deal found 3/13![Southwest logo]()
$331
This United Airlines deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ter 6/99:23 am
STL
- JAC
2 stops9h 31m
United Airlines
ter 6/164:23 pm
JAC
- STL
1 stop6h 34m
United Airlines
Deal found 3/13![United Airlines logo]()
$364
This Southwest deal was found by Cheapflights users on 3/16. 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.
qui 6/49:10 pm
MCI
- BOI
1 stop5h 35m
Southwest
seg 6/84:25 pm
BOI
- MCI
1 stop5h 55m
Southwest
Deal found 3/16![Southwest logo]()
$331
This Delta deal was found by Cheapflights users on 3/12. 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.
qua 9/92:15 pm
MCI
- JAC
1 stop5h 42m
Delta
qui 9/175:30 pm
JAC
- MCI
1 stop5h 50m
Delta
Deal found 3/12![Delta logo]()
$366
This Alaska Airlines deal was found by Cheapflights users on 3/12. 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.
ter 4/284:46 pm
STL
- GEG
1 stop9h 09m
Alaska Airlines
qua 4/296:00 am
GEG
- STL
1 stop7h 50m
Alaska Airlines
Deal found 3/12![Alaska Airlines logo]()
$367
This United Airlines deal was found by Cheapflights users on 3/12. 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.
qua 4/159:55 am
MCI
- GEG
2 stops13h 16m
United Airlines
dom 4/195:05 am
GEG
- MCI
1 stop5h 47m
United Airlines
Deal found 3/12![United Airlines logo]()
$367
This Delta deal was found by Cheapflights users on 3/12. 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.
sex 5/82:27 pm
STL
- JAC
1 stop8h 02m
Delta
ter 5/127:00 am
JAC
- STL
2 stops9h 16m
Delta
Deal found 3/12![Delta logo]()
$392
This Southwest deal was found by Cheapflights users on 3/12. 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.
qua 4/228:25 am
STL
- BOI
2 stops9h 00m
Southwest
dom 4/264:10 pm
BOI
- STL
1 stop6h 35m
Southwest
Deal found 3/12![Southwest logo]()
$369
This United Airlines deal was found by Cheapflights users on 3/12. 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.
sex 3/2711:33 am
MCI
- JAC
1 stop7h 19m
United Airlines
ter 3/314:15 pm
JAC
- MCI
1 stop6h 17m
United Airlines
Deal found 3/12![United Airlines logo]()
$379
This Alaska Airlines deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ter 4/216:00 am
SGF
- GEG
2 stops11h 34m
Alaska Airlines
sáb 5/27:27 am
GEG
- SGF
2 stops11h 19m
Alaska Airlines
Deal found 3/13![Alaska Airlines logo]()
$455
This United Airlines deal was found by Cheapflights users on 3/12. 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.
ter 5/58:46 am
STL
- IDA
1 stop5h 39m
United Airlines
sáb 5/92:31 pm
IDA
- STL
1 stop5h 12m
United Airlines
Deal found 3/12![United Airlines logo]()
$399
This Delta deal was found by Cheapflights users on 3/16. 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.
qua 4/16:32 am
STL
- IDA
2 stops12h 43m
Delta
dom 4/55:45 am
IDA
- STL
1 stop6h 32m
Delta
Deal found 3/16![Delta logo]()
$445
This Southwest deal was found by Cheapflights users on 3/14. 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.
sex 4/105:15 pm
STL
- BOI
2 stops8h 45m
Southwest
qua 4/153:15 pm
BOI
- STL
1 stop5h 30m
Southwest
Deal found 3/14![Southwest logo]()
$407
Last-minute flights from Missouri to IdahoDiscover last-minute flight deals from Missouri to Idaho. Data last updated março 17, 2026 and is based on user searches.
Discover last-minute flight deals from Missouri to Idaho. Data last updated março 17, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 3/12. 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.
sáb 4/48:16 pm
STL
- BOI
1 stop15h 52m
Frontier
dom 4/1212:03 pm
BOI
- STL
1 stop20h 45m
Frontier
Deal found 3/12![Frontier logo]()
$240
This Alaska Airlines deal was found by Cheapflights users on 3/12. 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.
ter 4/73:50 pm
STL
- BOI
1 stop8h 07m
Alaska Airlines
qua 4/82:22 pm
BOI
- STL
1 stop8h 37m
Alaska Airlines
Deal found 3/12![Alaska Airlines logo]()
$277
This Delta deal was found by Cheapflights users on 3/12. 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.
ter 4/76:12 pm
STL
- BOI
1 stop4h 59m
Delta
sáb 4/118:00 am
BOI
- STL
1 stop5h 43m
Delta
Deal found 3/12![Delta logo]()
$297
This Gotogate deal was found by Cheapflights users on 3/14. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qua 4/88:16 pm
STL
- GEG
1 stop16h 05m
Frontier
dom 4/1211:06 am
GEG
- STL
1 stop20h 42m
Frontier
Deal found 3/14![Frontier logo]()
$239
This Delta deal was found by Cheapflights users on 3/12. 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.
sáb 4/117:55 am
MCI
- BOI
1 stop9h 08m
Delta
sáb 4/181:52 pm
BOI
- MCI
1 stop8h 51m
Delta
Deal found 3/12![Delta logo]()
$267
This American Airlines deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb 4/115:00 am
MCI
- BOI
1 stop9h 03m
American Airlines
sáb 4/181:29 pm
BOI
- MCI
1 stop8h 28m
American Airlines
Deal found 3/13![American Airlines logo]()
$277
This United Airlines deal was found by Cheapflights users on 3/12. 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.
ter 4/146:00 am
MCI
- BOI
1 stop4h 54m
United Airlines
sáb 4/189:26 am
BOI
- MCI
2 stops10h 08m
United Airlines
Deal found 3/12![United Airlines logo]()
$282
This Southwest deal was found by Cheapflights users on 3/12. 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.
ter 4/142:30 pm
MCI
- BOI
2 stops8h 40m
Southwest
sáb 4/1811:00 am
BOI
- MCI
2 stops8h 35m
Southwest
Deal found 3/12![Southwest logo]()
$287
This Booking.com deal was found by Cheapflights users on 3/12. 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.
sáb 4/252:51 pm
MCI
- GEG
1 stop21h 58m
Frontier
dom 5/311:44 am
GEG
- MCI
1 stop23h 46m
Frontier
Deal found 3/12![Frontier logo]()
$243
This American Airlines deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ter 4/287:05 am
MCI
- GEG
1 stop7h 27m
American Airlines
sáb 5/21:22 pm
GEG
- MCI
1 stop8h 37m
American Airlines
Deal found 3/13![American Airlines logo]()
$277
This Alaska Airlines deal was found by Cheapflights users on 3/12. 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.
ter 4/287:00 am
MCI
- GEG
1 stop18h 11m
Alaska Airlines
sáb 5/22:45 pm
GEG
- MCI
1 stop7h 14m
Alaska Airlines
Deal found 3/12![Alaska Airlines logo]()
$287
This Delta deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ter 4/287:42 am
MCI
- GEG
1 stop6h 45m
Delta
sáb 5/21:07 pm
GEG
- MCI
1 stop8h 36m
Delta
Deal found 3/17![Delta logo]()
$307
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 março 17, 2026.
Search for one-way flight options from Missouri to Idaho. Find affordable one-way fares based on user searches. Data last updated março 17, 2026.
This Mytrip deal was found by Cheapflights users on 3/12. 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.
sáb 4/182:51 pm
MCI
- GEG
1 stop21h 58m
Frontier
Deal found 3/12![Frontier logo]()
$115
This American Airlines deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb 4/257:05 am
MCI
- GEG
1 stop7h 27m
American Airlines
Deal found 3/16![American Airlines logo]()
$139
This Delta deal was found by Cheapflights users on 3/16. 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.
qua 4/157:59 pm
MCI
- BOI
1 stop4h 58m
Delta
Deal found 3/16![Delta logo]()
$139
This United Airlines deal was found by Cheapflights users on 3/12. 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.
sáb 4/1811:30 am
MCI
- GEG
2 stops11h 41m
United Airlines
Deal found 3/12![United Airlines logo]()
$144
This Southwest deal was found by Cheapflights users on 3/16. 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.
qua 4/157:45 am
MCI
- BOI
2 stops8h 40m
Southwest
Deal found 3/16![Southwest logo]()
$144
This Mytrip deal was found by Cheapflights users on 3/12. 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.
sáb 3/288:12 pm
STL
- GEG
1 stop16h 36m
Frontier
Deal found 3/12![Frontier logo]()
$155
This United Airlines deal was found by Cheapflights users on 3/16. 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.
sáb 5/96:00 am
MCI
- BOI
2 stops10h 26m
United Airlines
Deal found 3/16![United Airlines logo]()
$164
This Expedia deal was found by Cheapflights users on 3/16. 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.
qui 9/103:24 pm
STL
- IDA
1 stop8h 15m
Alaska Airlines
Deal found 3/16![Alaska Airlines logo]()
$170
This Delta deal was found by Cheapflights users on 3/12. 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.
sáb 4/2512:17 pm
MCI
- GEG
2 stops10h 45m
Delta
Deal found 3/12![Delta logo]()
$179
This American Airlines deal was found by Cheapflights users on 3/15. 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.
ter 6/305:30 am
MCI
- BOI
1 stop5h 59m
American Airlines
Deal found 3/15![American Airlines logo]()
$194
This Southwest deal was found by Cheapflights users on 3/15. 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.
ter 6/305:30 pm
MCI
- BOI
2 stops7h 55m
Southwest
Deal found 3/15![Southwest logo]()
$199
This United Airlines deal was found by Cheapflights users on 3/12. 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.
dom 7/55:10 am
STL
- IDA
1 stop5h 40m
United Airlines
Deal found 3/12![United Airlines logo]()
$200
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 março 17, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $239 (Gotogate) |
One-way from | $115 (Mytrip) |
Popular in | February |
Cheapest in | January |
Average price | $538 |
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 março 17, 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
ter 4/7
3:50 pm-10:57 pm
1 stop8h 07m
Boise Air Term. Gowen Fld
qua 4/8
2:22 pm-11:59 pm
1 stop8h 37m
$277
Kansas CityBoise
MCI - BOI
MCIBOI
Kansas City
ter 4/14
6:00 am-9:54 am
1 stop4h 54m
Boise Air Term. Gowen Fld
sáb 4/18
9:26 am-8:34 pm
2 stops10h 08m
$282
Kansas CityBoise
MCI - BOI
MCIBOI
Kansas City
qua 5/6
7:00 am-1:52 pm
1 stop7h 52m
Boise Air Term. Gowen Fld
dom 5/10
6:00 am-2:04 pm
1 stop7h 04m
$286
Kansas CityBoise
MCI - BOI
MCIBOI
Kansas City
ter 4/21
7:05 am-2:40 pm
2 stops8h 35m
Boise Air Term. Gowen Fld
sáb 4/25
11:00 am-8:35 pm
2 stops8h 35m
$287
Kansas CityBoise
MCI - BOI
MCIBOI
Kansas City
ter 4/14
2:30 pm-10:10 pm
2 stops8h 40m
Boise Air Term. Gowen Fld
sáb 4/18
11:00 am-8:35 pm
2 stops8h 35m
$287
Kansas CitySpokane
MCI - GEG
MCIGEG
Kansas City
ter 4/28
7:00 am-11:11 pm
1 stop18h 11m
Spokane
sáb 5/2
2:45 pm-11:59 pm
1 stop7h 14m
$287
St. LouisBoise
STL - BOI
STLBOI
Lambert-St Louis
ter 4/7
6:12 pm-10:11 pm
1 stop4h 59m
Boise Air Term. Gowen Fld
sáb 4/11
8:00 am-2:43 pm
1 stop5h 43m
$297
Kansas CityBoise
MCI - BOI
MCIBOI
Kansas City
qua 6/3
4:40 pm-11:30 pm
1 stop7h 50m
Boise Air Term. Gowen Fld
seg 6/8
4:25 pm-12:30 am
2 stops7h 05m
$309
Kansas CityBoise
MCI - BOI
MCIBOI
Kansas City
qua 4/15
6:15 am-1:58 pm
1 stop8h 43m
Boise Air Term. Gowen Fld
sáb 4/18
6:00 am-1:29 pm
1 stop6h 29m
$316
Kansas CityBoise
MCI - BOI
MCIBOI
Kansas City
sáb 4/11
4:02 pm-9:09 pm
1 stop6h 07m
Boise Air Term. Gowen Fld
sáb 4/18
8:59 am-8:56 pm
2 stops10h 57m
$327
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-GEG
MCI-BOI
STL-GEG
STL-IDA
STL-BOI
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-GEG
MCI-BOI
STL-GEG
STL-IDA
What is the cheapest month to book a flight from Missouri to Idaho?
Currently, June is the cheapest month in which you can book a flight from Missouri to Idaho (average of $133). Flying from Missouri to Idaho in January is currently the most expensive (average of $293). 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.
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 março 17, 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.
Crew
8.6
Overall
8.0
Boarding
8.1
Comfort
8.0
Food
7.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Crew
8.6
Overall
8.0
Boarding
8.1
Comfort
8.0
Food
7.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Crew
8.6
Overall
8.0
Boarding
8.1
Comfort
8.0
Food
7.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Crew
8.6
Overall
8.0
Boarding
8.1
Comfort
8.0
Food
7.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Crew
8.6
Overall
8.0
Boarding
8.1
Comfort
8.0
Food
7.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Crew
8.6
Overall
8.0
Boarding
8.1
Comfort
8.0
Food
7.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
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
Toggle through the tabs below to find thousands of 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 março 17, 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 março 17, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$133 | Average$351 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$171 | Average$436 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$252 | Average$458 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$266 | Average$427 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$288 | Average$398 | FlexibilityNo cancel fee | On-time75% |