$94+ 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 4/2. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — STL
Apr 20 — Apr 271
Round-trip
1 adult, Economy
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Find cheap flights from Idaho to Missouri with Cheapflights
1. Tell us where you want to go
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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 March 21, 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 March 21, 2026.
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/912:03 pm
BOI
- MCI
1 stop6h 58m
Frontier
Sat 4/182:51 pm
MCI
- BOI
1 stop21h 17m
Frontier
Deal found 3/16![Frontier logo]()
$200
This CheapOair deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” 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 5/71:22 pm
BOI
- MCI
1 stop23h 27m
Frontier
Mon 5/112:34 pm
MCI
- BOI
1 stop22h 53m
Frontier
Deal found 3/20![Frontier logo]()
$212
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.
Fri 5/2912:33 pm
GEG
- MCI
1 stop23h 16m
Frontier
Tue 6/22:34 pm
MCI
- GEG
1 stop23h 04m
Frontier
Deal found 3/16![Frontier logo]()
$270
This Kiwi.com deal was found by Cheapflights users on 3/18. 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.
Tue 5/261:25 pm
BOI
- MCI
1 stop23h 24m
Frontier
Mon 6/12:34 pm
MCI
- BOI
1 stop22h 56m
Frontier
Deal found 3/18![Frontier logo]()
$273
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/142:22 pm
BOI
- STL
1 stop8h 37m
Alaska Airlines
Wed 4/157:00 am
STL
- BOI
1 stop9h 29m
Alaska Airlines
Deal found 3/16![Alaska Airlines logo]()
$277
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.
Tue 4/144:05 pm
BOI
- MCI
1 stop5h 20m
Southwest
Sat 4/185:35 am
MCI
- BOI
1 stop8h 45m
Southwest
Deal found 3/16![Southwest logo]()
$277
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.
Tue 4/141:22 pm
GEG
- MCI
1 stop8h 37m
American Airlines
Tue 4/217:05 am
MCI
- GEG
1 stop7h 27m
American Airlines
Deal found 3/16![American Airlines logo]()
$277
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.
Tue 4/145:10 am
GEG
- MCI
2 stops8h 40m
Southwest
Tue 4/217:10 am
MCI
- GEG
1 stop5h 05m
Southwest
Deal found 3/16![Southwest logo]()
$282
This Southwest deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” 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 4/153:15 pm
BOI
- MCI
1 stop6h 20m
Southwest
Sat 4/185:35 pm
MCI
- BOI
1 stop6h 15m
Southwest
Deal found 3/20![Southwest logo]()
$292
This CheapOair deal was found by Cheapflights users on 3/18. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/281:25 pm
BOI
- MCI
1 stop23h 24m
Frontier
Mon 6/12:34 pm
MCI
- BOI
1 stop22h 56m
Frontier
Deal found 3/18![Frontier logo]()
$302
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.
Tue 4/216:00 am
GEG
- STL
1 stop6h 29m
Delta
Thu 4/236:45 pm
STL
- GEG
1 stop6h 49m
Delta
Deal found 3/16![Delta logo]()
$304
This Delta deal was found by Cheapflights users on 3/18. 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.
Tue 5/266:41 pm
BOI
- MCI
1 stop4h 44m
Delta
Thu 6/46:19 am
MCI
- BOI
1 stop7h 59m
Delta
Deal found 3/18![Delta logo]()
$304
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 March 21, 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 March 21, 2026.
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/142:22 pm
BOI
- STL
1 stop8h 37m
Alaska Airlines
Wed 4/157:00 am
STL
- BOI
1 stop9h 29m
Alaska Airlines
Deal found 3/16![Alaska Airlines logo]()
$277
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.
Tue 4/146:00 am
BOI
- MCI
2 stops8h 50m
Southwest
Sat 4/186:05 am
MCI
- BOI
2 stops8h 15m
Southwest
Deal found 3/16![Southwest logo]()
$287
This Delta deal was found by Cheapflights users on 3/18. 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 5/286:41 pm
BOI
- MCI
1 stop4h 44m
Delta
Wed 6/36:19 am
MCI
- BOI
1 stop7h 59m
Delta
Deal found 3/18![Delta logo]()
$304
This United Airlines deal was found by Cheapflights users on 3/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/184:01 pm
GEG
- MCI
1 stop5h 31m
United Airlines
Sat 4/251:54 pm
MCI
- GEG
2 stops9h 41m
United Airlines
Deal found 3/19![United Airlines logo]()
$322
This American Airlines deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” 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 4/181:25 pm
JAC
- STL
1 stop8h 34m
American Airlines
Sat 4/255:20 am
STL
- JAC
1 stop8h 20m
American Airlines
Deal found 3/20![American Airlines logo]()
$359
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/152:22 pm
BOI
- MCI
1 stop8h 37m
Alaska Airlines
Sat 4/186:15 am
MCI
- BOI
1 stop7h 07m
Alaska Airlines
Deal found 3/16![Alaska Airlines logo]()
$277
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.
Tue 4/145:10 am
GEG
- MCI
2 stops8h 40m
Southwest
Tue 4/214:40 pm
MCI
- GEG
2 stops8h 45m
Southwest
Deal found 3/16![Southwest logo]()
$287
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.
Thu 4/3011:25 am
GEG
- MCI
2 stops10h 32m
Delta
Thu 5/77:05 am
MCI
- GEG
1 stop7h 08m
Delta
Deal found 3/16![Delta logo]()
$312
This Southwest deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” 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 4/154:05 pm
BOI
- MCI
1 stop5h 20m
Southwest
Sat 4/186:05 am
MCI
- BOI
2 stops8h 15m
Southwest
Deal found 3/20![Southwest logo]()
$297
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.
Fri 8/215:44 pm
BOI
- SGF
1 stop4h 58m
United Airlines
Tue 8/255:40 am
SGF
- BOI
1 stop4h 55m
United Airlines
Deal found 3/16![United Airlines logo]()
$340
This Alaska Airlines 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/147:10 am
GEG
- STL
1 stop14h 49m
Alaska Airlines
Tue 4/213:50 pm
STL
- GEG
1 stop9h 20m
Alaska Airlines
Deal found 3/17![Alaska Airlines logo]()
$317
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.
Tue 4/216:16 pm
BOI
- STL
1 stop5h 09m
Delta
Tue 4/2812:23 pm
STL
- BOI
2 stops10h 01m
Delta
Deal found 3/16![Delta logo]()
$326
This Alaska Airlines deal was found by Cheapflights users on 3/19. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/183:33 pm
GEG
- MCI
1 stop6h 26m
Alaska Airlines
Sat 4/252:58 pm
MCI
- GEG
1 stop8h 33m
Alaska Airlines
Deal found 3/19![Alaska Airlines logo]()
$317
This Southwest deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” 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 4/185:45 am
GEG
- STL
2 stops10h 25m
Southwest
Sat 4/257:00 am
STL
- GEG
1 stop7h 25m
Southwest
Deal found 3/20![Southwest logo]()
$322
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.
Wed 5/202:31 pm
IDA
- STL
1 stop5h 12m
United Airlines
Mon 5/255:10 am
STL
- IDA
1 stop5h 40m
United Airlines
Deal found 3/16![United Airlines logo]()
$361
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.
Tue 4/146:58 pm
IDA
- STL
2 stops12h 32m
Delta
Tue 4/216:45 pm
STL
- IDA
1 stop4h 55m
Delta
Deal found 3/16![Delta logo]()
$334
This Alaska Airlines deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” 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 4/113:33 pm
GEG
- MCI
1 stop6h 26m
Alaska Airlines
Sat 4/182:23 pm
MCI
- GEG
1 stop6h 38m
Alaska Airlines
Deal found 3/20![Alaska Airlines logo]()
$317
This United Airlines deal was found by Cheapflights users on 3/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/292:05 pm
BOI
- MCI
1 stop7h 10m
United Airlines
Tue 6/24:26 pm
MCI
- BOI
1 stop6h 39m
United Airlines
Deal found 3/19![United Airlines logo]()
$362
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.
Mon 4/131:30 pm
GEG
- STL
1 stop8h 20m
Southwest
Mon 4/206:00 pm
STL
- GEG
1 stop8h 30m
Southwest
Deal found 3/16![Southwest logo]()
$331
This Delta deal was found by Cheapflights users on 3/18. 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 4/1611:25 am
GEG
- STL
2 stops9h 49m
Delta
Thu 4/236:45 pm
STL
- GEG
1 stop6h 49m
Delta
Deal found 3/18![Delta logo]()
$359
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/112:20 pm
JAC
- STL
1 stop7h 53m
United Airlines
Sun 4/57:45 am
STL
- JAC
2 stops8h 44m
United Airlines
Deal found 3/17![United Airlines logo]()
$364
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.
Wed 4/12:18 pm
IDA
- SGF
1 stop7h 11m
American Airlines
Sun 4/57:15 am
SGF
- IDA
1 stop7h 33m
American Airlines
Deal found 3/16![American Airlines logo]()
$485
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/147:00 am
GEG
- STL
2 stops9h 05m
Southwest
Tue 4/215:35 am
STL
- GEG
2 stops9h 30m
Southwest
Deal found 3/17![Southwest logo]()
$341
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/316:00 am
IDA
- MCI
1 stop6h 29m
Alaska Airlines
Sat 4/42:23 pm
MCI
- IDA
1 stop9h 29m
Alaska Airlines
Deal found 3/16![Alaska Airlines logo]()
$349
This United Airlines deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” 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 4/75:00 am
BOI
- SGF
1 stop6h 49m
United Airlines
Tue 4/146:00 am
SGF
- BOI
1 stop6h 49m
United Airlines
Deal found 3/20![United Airlines logo]()
$374
This American Airlines deal was found by Cheapflights users on 3/18. 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 5/293:11 pm
BOI
- SGF
1 stop6h 29m
American Airlines
Tue 6/27:11 am
SGF
- BOI
1 stop8h 09m
American Airlines
Deal found 3/18![American Airlines logo]()
$499
This Delta deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/103:25 pm
GEG
- MCI
1 stop5h 51m
Delta
Tue 4/147:59 pm
MCI
- GEG
1 stop5h 35m
Delta
Deal found 3/20![Delta logo]()
$387
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/206:04 pm
BOI
- MCI
2 stops21h 52m
Alaska Airlines
Wed 4/227:00 am
MCI
- BOI
1 stop6h 35m
Alaska Airlines
Deal found 3/16![Alaska Airlines logo]()
$355
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.
Tue 5/52:00 pm
BOI
- MCI
1 stop6h 30m
Southwest
Sun 5/106:10 pm
MCI
- BOI
2 stops8h 15m
Southwest
Deal found 3/16![Southwest logo]()
$367
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/155:29 pm
BOI
- MCI
1 stop5h 03m
United Airlines
Sat 4/1811:30 am
MCI
- BOI
2 stops11h 04m
United Airlines
Deal found 3/17![United Airlines logo]()
$377
Last-minute flights from Idaho to MissouriDiscover last-minute flight deals from Idaho to Missouri. Data last updated March 21, 2026 and is based on user searches.
Discover last-minute flight deals from Idaho to Missouri. Data last updated March 21, 2026 and is based on user searches.
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/912:03 pm
BOI
- MCI
1 stop6h 58m
Frontier
Sat 4/182:51 pm
MCI
- BOI
1 stop21h 17m
Frontier
Deal found 3/16![Frontier logo]()
$200
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.
Thu 4/912:03 pm
BOI
- MCI
1 stop6h 58m
Multiple Airlines
Sat 4/186:15 am
MCI
- BOI
2 stops10h 16m
Multiple Airlines
Deal found 3/16![Multiple Airlines logo]()
$310
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/142:22 pm
BOI
- STL
1 stop8h 37m
Alaska Airlines
Wed 4/157:00 am
STL
- BOI
1 stop9h 29m
Alaska Airlines
Deal found 3/16![Alaska Airlines logo]()
$277
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.
Tue 4/144:05 pm
BOI
- MCI
1 stop5h 20m
Southwest
Sat 4/185:35 am
MCI
- BOI
1 stop8h 45m
Southwest
Deal found 3/16![Southwest logo]()
$277
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.
Tue 4/141:22 pm
GEG
- MCI
1 stop8h 37m
American Airlines
Tue 4/217:05 am
MCI
- GEG
1 stop7h 27m
American Airlines
Deal found 3/16![American Airlines logo]()
$277
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.
Tue 4/145:10 am
GEG
- MCI
2 stops8h 40m
Southwest
Tue 4/217:10 am
MCI
- GEG
1 stop5h 05m
Southwest
Deal found 3/16![Southwest logo]()
$282
This Southwest deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” 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 4/153:15 pm
BOI
- MCI
1 stop6h 20m
Southwest
Sat 4/185:35 pm
MCI
- BOI
1 stop6h 15m
Southwest
Deal found 3/20![Southwest logo]()
$292
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.
Wed 4/158:59 am
BOI
- MCI
2 stops9h 07m
Delta
Wed 4/227:42 am
MCI
- BOI
1 stop9h 32m
Delta
Deal found 3/16![Delta logo]()
$312
This Expedia deal was found by Cheapflights users on 3/18. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/1611:44 am
GEG
- STL
1 stop5h 37m
Multiple Airlines
Thu 4/234:46 pm
STL
- GEG
1 stop9h 09m
Multiple Airlines
Deal found 3/18![Multiple Airlines logo]()
$310
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.
Tue 4/216:00 am
GEG
- STL
1 stop6h 29m
Delta
Thu 4/236:45 pm
STL
- GEG
1 stop6h 49m
Delta
Deal found 3/16![Delta logo]()
$304
This Expedia deal was found by Cheapflights users on 3/18. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/2311:44 am
GEG
- STL
1 stop5h 37m
Multiple Airlines
Mon 5/117:00 am
STL
- GEG
1 stop7h 40m
Multiple Airlines
Deal found 3/18![Multiple Airlines logo]()
$308
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.
Thu 4/3011:25 am
GEG
- MCI
2 stops10h 32m
Delta
Thu 5/77:05 am
MCI
- GEG
1 stop7h 08m
Delta
Deal found 3/16![Delta logo]()
$312
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 March 21, 2026.
Search for one-way flight options from Idaho to Missouri. Find affordable one-way fares based on user searches. Data last updated March 21, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/18. 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 4/212:03 pm
BOI
- STL
1 stop20h 45m
Frontier
Deal found 3/18![Frontier logo]()
$94
This CheapOair deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” 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 4/912:03 pm
BOI
- STL
1 stop20h 45m
Frontier
Deal found 3/21![Frontier logo]()
$117
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.
Sat 4/118:00 am
BOI
- STL
1 stop5h 43m
Delta
Deal found 3/16![Delta logo]()
$139
This United Airlines deal was found by Cheapflights users on 3/18. 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.
Tue 4/142:37 pm
BOI
- MCI
1 stop4h 57m
United Airlines
Deal found 3/18![United Airlines logo]()
$139
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.
Sat 4/1811:00 am
BOI
- MCI
2 stops8h 35m
Southwest
Deal found 3/16![Southwest logo]()
$144
This Kissandfly.com deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/2612:15 pm
BOI
- STL
1 stop20h 34m
Frontier
Deal found 3/20![Frontier logo]()
$145
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/91:53 pm
BOI
- MCI
1 stop7h 57m
American Airlines
Deal found 3/17![American Airlines logo]()
$154
This American Airlines deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” 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 4/151:29 pm
BOI
- STL
1 stop7h 48m
American Airlines
Deal found 3/20![American Airlines logo]()
$159
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/97:05 am
BOI
- MCI
2 stops9h 10m
Southwest
Deal found 3/17![Southwest logo]()
$159
This Alaska Airlines deal was found by Cheapflights users on 3/18. 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.
Wed 4/295:00 am
GEG
- MCI
1 stop7h 04m
Alaska Airlines
Deal found 3/18![Alaska Airlines logo]()
$159
This Southwest deal was found by Cheapflights users on 3/18. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/296:30 am
GEG
- MCI
2 stops9h 00m
Southwest
Deal found 3/18![Southwest logo]()
$164
This Alaska Airlines deal was found by Cheapflights users on 3/18. 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.
Thu 6/44:03 pm
IDA
- STL
1 stop23h 34m
Alaska Airlines
Deal found 3/18![Alaska Airlines logo]()
$165
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 March 21, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $200 (Frontier) |
One-way from | $94 (Kiwi.com) |
Popular in | November |
Cheapest in | September |
Average price | $471 |
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 March 21, 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
Tue 4/14
2:22 pm-11:59 pm
1 stop8h 37m
Lambert-St Louis
Wed 4/15
7:00 am-3:29 pm
1 stop9h 29m
$277
BoiseKansas City
BOI - MCI
BOIMCI
Boise Air Term. Gowen Fld
Wed 4/15
2:22 pm-11:59 pm
1 stop8h 37m
Kansas City
Sat 4/18
6:15 am-12:22 pm
1 stop7h 07m
$277
BoiseKansas City
BOI - MCI
BOIMCI
Boise Air Term. Gowen Fld
Tue 4/14
6:00 am-3:50 pm
2 stops8h 50m
Kansas City
Sat 4/18
6:05 am-1:20 pm
2 stops8h 15m
$287
SpokaneKansas City
GEG - MCI
GEGMCI
Spokane
Tue 4/14
5:10 am-3:50 pm
2 stops8h 40m
Kansas City
Tue 4/21
4:40 pm-11:25 pm
2 stops8h 45m
$287
BoiseKansas City
BOI - MCI
BOIMCI
Boise Air Term. Gowen Fld
Wed 4/15
4:05 pm-10:25 pm
1 stop5h 20m
Kansas City
Sat 4/18
6:05 am-1:20 pm
2 stops8h 15m
$297
BoiseKansas City
BOI - MCI
BOIMCI
Boise Air Term. Gowen Fld
Thu 5/28
6:41 pm-12:25 am
1 stop4h 44m
Kansas City
Wed 6/3
6:19 am-1:18 pm
1 stop7h 59m
$304
SpokaneKansas City
GEG - MCI
GEGMCI
Spokane
Thu 4/30
11:25 am-11:57 pm
2 stops10h 32m
Kansas City
Thu 5/7
7:05 am-12:13 pm
1 stop7h 08m
$312
SpokaneSt. Louis
GEG - STL
GEGSTL
Spokane
Tue 4/14
7:10 am-11:59 pm
1 stop14h 49m
Lambert-St Louis
Tue 4/21
3:50 pm-11:10 pm
1 stop9h 20m
$317
SpokaneKansas City
GEG - MCI
GEGMCI
Spokane
Sat 4/18
3:33 pm-11:59 pm
1 stop6h 26m
Kansas City
Sat 4/25
2:58 pm-9:31 pm
1 stop8h 33m
$317
SpokaneKansas City
GEG - MCI
GEGMCI
Spokane
Sat 4/11
3:33 pm-11:59 pm
1 stop6h 26m
Kansas City
Sat 4/18
2:23 pm-7:01 pm
1 stop6h 38m
$317
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-MCI
GEG-MCI
BOI-STL
GEG-STL
IDA-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-MCI
GEG-MCI
BOI-STL
GEG-STL
What is the cheapest month to book a flight from Idaho to Missouri?
Currently, April is the cheapest month in which you can book a flight from Idaho to Missouri (average of $113). Flying from Idaho to Missouri in December is currently the most expensive (average of $301). 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 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 March 21, 2026.
See what other customers who have flown with Southwest,Alaska Airlines, 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.
Crew
8.6
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
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.
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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 March 21, 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 March 21, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$163 | Average$395 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$237 | Average$430 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$262 | Average$391 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$278 | Average$388 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$283 | Average$488 | FlexibilityNo cancel fee | On-time69% |