$136+ 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 8/3. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BOI
Jun 5 — Jun 121
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 May 6, 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 May 6, 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.
Wed 6/108:08 pm
STL
- BOI
1 stop17h 22m
Frontier
Sun 6/141:25 pm
BOI
- STL
1 stop28h 28m
Frontier
Deal found 5/1![Frontier logo]()
$261
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/88:08 pm
STL
- BOI
1 stop17h 21m
Frontier
Sun 8/231:04 pm
BOI
- STL
1 stop5h 19m
Frontier
Deal found 5/5![Frontier logo]()
$274
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/261:45 pm
MCI
- BOI
1 stop23h 24m
Frontier
Sun 8/301:04 pm
BOI
- MCI
1 stop22h 56m
Frontier
Deal found 5/5![Frontier logo]()
$299
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 8/257:40 pm
MCI
- BOI
1 stop5h 16m
Delta
Tue 9/15:45 pm
BOI
- MCI
1 stop5h 35m
Delta
Deal found 5/1![Delta logo]()
$307
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.
Tue 8/257:15 am
SGF
- BOI
1 stop7h 59m
American Airlines
Sat 8/292:46 pm
BOI
- SGF
1 stop6h 59m
American Airlines
Deal found 5/3![American Airlines logo]()
$311
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/11:45 pm
MCI
- GEG
1 stop23h 48m
Frontier
Mon 9/712:28 pm
GEG
- MCI
1 stop22h 32m
Frontier
Deal found 5/4![Frontier logo]()
$315
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 8/126:06 am
SGF
- GEG
1 stop7h 22m
Delta
Tue 8/185:36 am
GEG
- SGF
2 stops10h 37m
Delta
Deal found 5/3![Delta logo]()
$316
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 8/126:06 am
SGF
- GEG
1 stop7h 22m
Delta
Mon 8/1712:40 pm
GEG
- SGF
1 stop7h 41m
Delta
Deal found 5/3![Delta logo]()
$320
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.
Fri 8/216:06 am
SGF
- GEG
2 stops12h 03m
Delta
Tue 8/2512:40 pm
GEG
- SGF
1 stop7h 41m
Delta
Deal found 5/3![Delta logo]()
$325
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 6/27:40 pm
MCI
- BOI
1 stop5h 24m
Delta
Tue 6/96:42 pm
BOI
- MCI
1 stop4h 36m
Delta
Deal found 5/5![Delta logo]()
$327
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.
Mon 8/176:06 am
SGF
- GEG
1 stop7h 22m
Delta
Mon 8/2410:56 pm
GEG
- SGF
1 stop10h 00m
Delta
Deal found 5/3![Delta logo]()
$329
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.
Thu 6/182:55 pm
MCI
- JAC
1 stop5h 47m
Delta
Tue 6/236:05 pm
JAC
- MCI
1 stop5h 13m
Delta
Deal found 5/4![Delta logo]()
$329
Best flights from Missouri to IdahoDiscover carefully curated flight deals from Missouri to Idaho that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 6, 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 May 6, 2026.
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 8/186:02 am
MCI
- BOI
1 stop7h 24m
Alaska Airlines
Wed 8/196:00 am
BOI
- MCI
1 stop5h 38m
Alaska Airlines
Deal found 5/1![Alaska Airlines logo]()
$307
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 8/295:40 am
SGF
- BOI
1 stop4h 55m
United Airlines
Tue 9/15:44 pm
BOI
- SGF
1 stop4h 58m
United Airlines
Deal found 5/3![United Airlines logo]()
$311
This Delta deal was found by Cheapflights users on 5/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/256:28 am
MCI
- BOI
1 stop8h 14m
Delta
Tue 9/18:45 am
BOI
- MCI
1 stop7h 38m
Delta
Deal found 5/6![Delta logo]()
$327
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/26:35 am
STL
- BOI
1 stop5h 20m
Southwest
Tue 6/93:00 pm
BOI
- STL
1 stop5h 50m
Southwest
Deal found 5/5![Southwest logo]()
$357
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/237:04 am
STL
- BOI
1 stop9h 02m
American Airlines
Tue 6/304:06 pm
BOI
- STL
1 stop6h 53m
American Airlines
Deal found 5/5![American Airlines logo]()
$403
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.
Thu 6/182:55 pm
MCI
- JAC
1 stop5h 47m
Delta
Tue 6/236:05 pm
JAC
- MCI
1 stop5h 13m
Delta
Deal found 5/4![Delta logo]()
$329
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.
Sat 5/166:00 am
MCI
- JAC
1 stop4h 42m
United Airlines
Wed 5/204:15 pm
JAC
- MCI
1 stop6h 44m
United Airlines
Deal found 5/1![United Airlines logo]()
$336
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 9/227:00 am
MCI
- GEG
1 stop7h 39m
Alaska Airlines
Wed 9/235:09 am
GEG
- MCI
1 stop5h 29m
Alaska Airlines
Deal found 5/1![Alaska Airlines logo]()
$347
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/32:15 pm
MCI
- JAC
1 stop5h 42m
Delta
Wed 10/75:30 pm
JAC
- MCI
1 stop5h 51m
Delta
Deal found 5/2![Delta logo]()
$329
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/411:25 am
MCI
- BOI
1 stop7h 30m
Southwest
Wed 7/811:30 am
BOI
- MCI
2 stops8h 05m
Southwest
Deal found 5/5![Southwest logo]()
$392
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 6/27:41 pm
STL
- GEG
1 stop6h 18m
Alaska Airlines
Wed 6/31:59 pm
GEG
- STL
1 stop7h 55m
Alaska Airlines
Deal found 5/5![Alaska Airlines logo]()
$380
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.
Tue 5/267:10 am
STL
- GEG
1 stop7h 55m
Southwest
Tue 5/262:25 pm
GEG
- STL
1 stop6h 50m
Southwest
Deal found 5/2![Southwest logo]()
$397
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 8/181:45 pm
MCI
- BOI
2 stops11h 05m
United Airlines
Wed 8/196:30 am
BOI
- MCI
1 stop5h 09m
United Airlines
Deal found 5/1![United Airlines logo]()
$402
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/287:40 pm
MCI
- GEG
1 stop5h 55m
Delta
Mon 6/14:59 pm
GEG
- MCI
1 stop5h 26m
Delta
Deal found 5/2![Delta logo]()
$367
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.
Sat 5/167:00 am
MCI
- IDA
1 stop9h 26m
Alaska Airlines
Wed 5/206:00 am
IDA
- MCI
1 stop6h 57m
Alaska Airlines
Deal found 5/1![Alaska Airlines logo]()
$399
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 5/272:30 pm
MCI
- GEG
2 stops9h 05m
Southwest
Sat 6/64:00 pm
GEG
- MCI
1 stop6h 40m
Southwest
Deal found 5/1![Southwest logo]()
$402
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/251:45 pm
MCI
- BOI
2 stops11h 05m
United Airlines
Tue 9/12:44 pm
BOI
- MCI
1 stop5h 07m
United Airlines
Deal found 5/4![United Airlines logo]()
$402
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.
Sat 6/67:05 am
MCI
- GEG
1 stop7h 06m
Delta
Mon 6/89:20 am
GEG
- MCI
2 stops12h 29m
Delta
Deal found 5/5![Delta logo]()
$368
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.
Tue 8/186:02 am
STL
- BOI
1 stop9h 05m
Alaska Airlines
Wed 8/196:20 am
BOI
- STL
1 stop6h 44m
Alaska Airlines
Deal found 5/4![Alaska Airlines logo]()
$403
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.
Fri 6/197:02 am
MCI
- IDA
1 stop4h 41m
Delta
Thu 6/2511:25 am
IDA
- MCI
1 stop4h 41m
Delta
Deal found 5/4![Delta logo]()
$370
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.
Sat 7/111:38 pm
STL
- JAC
1 stop5h 15m
United Airlines
Wed 7/158:00 am
JAC
- STL
1 stop9h 17m
United Airlines
Deal found 5/1![United Airlines logo]()
$409
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.
Fri 8/74:55 pm
MCI
- BOI
1 stop6h 40m
Southwest
Tue 8/116:00 am
BOI
- MCI
2 stops8h 25m
Southwest
Deal found 5/3![Southwest logo]()
$422
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.
Wed 5/275:52 pm
MCI
- GEG
1 stop7h 14m
Alaska Airlines
Sun 6/76:00 am
GEG
- MCI
1 stop5h 57m
Alaska Airlines
Deal found 5/1![Alaska Airlines logo]()
$407
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.
Tue 6/233:57 pm
STL
- JAC
1 stop5h 33m
Delta
Mon 6/296:05 pm
JAC
- STL
1 stop5h 38m
Delta
Deal found 5/4![Delta logo]()
$375
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.
Sat 6/65:45 am
MCI
- GEG
1 stop6h 30m
Southwest
Sat 6/1310:55 am
GEG
- MCI
2 stops9h 10m
Southwest
Deal found 5/1![Southwest logo]()
$427
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.
Sat 5/306:45 am
SGF
- GEG
1 stop6h 45m
United Airlines
Sat 6/64:08 pm
GEG
- SGF
1 stop5h 34m
United Airlines
Deal found 5/2![United Airlines logo]()
$432
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.
Thu 6/111:39 pm
STL
- JAC
1 stop7h 26m
Delta
Fri 6/196:05 pm
JAC
- STL
1 stop5h 38m
Delta
Deal found 5/4![Delta logo]()
$375
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/317:00 am
SGF
- GEG
1 stop6h 59m
American Airlines
Sat 8/16:30 am
GEG
- SGF
1 stop8h 48m
American Airlines
Deal found 5/2![American Airlines logo]()
$668
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/149:30 am
SGF
- BOI
1 stop6h 17m
Alaska Airlines
Sat 7/1812:14 pm
BOI
- SGF
1 stop8h 40m
Alaska Airlines
Deal found 5/2![Alaska Airlines logo]()
$422
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/235:20 pm
STL
- BOI
2 stops8h 05m
Southwest
Tue 6/304:05 pm
BOI
- STL
1 stop6h 50m
Southwest
Deal found 5/5![Southwest logo]()
$440
Last-minute flights from Missouri to IdahoDiscover last-minute flight deals from Missouri to Idaho. Data last updated May 6, 2026 and is based on user searches.
Discover last-minute flight deals from Missouri to Idaho. Data last updated May 6, 2026 and is based on user searches.
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.
Sat 5/166:00 am
MCI
- JAC
1 stop4h 42m
United Airlines
Wed 5/204:15 pm
JAC
- MCI
1 stop6h 44m
United Airlines
Deal found 5/1![United Airlines logo]()
$336
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 5/276:30 pm
MCI
- GEG
1 stop6h 25m
Southwest
Sat 6/64:00 pm
GEG
- MCI
1 stop6h 40m
Southwest
Deal found 5/1![Southwest logo]()
$352
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.
Wed 5/271:38 pm
STL
- JAC
1 stop5h 16m
United Airlines
Tue 6/27:30 am
JAC
- STL
1 stop7h 16m
United Airlines
Deal found 5/3![United Airlines logo]()
$359
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.
Mon 6/15:27 pm
STL
- BOI
2 stops20h 03m
Frontier
Sun 6/71:33 pm
BOI
- STL
1 stop28h 50m
Frontier
Deal found 5/2![Frontier logo]()
$333
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 6/27:40 pm
MCI
- BOI
1 stop5h 24m
Delta
Tue 6/96:42 pm
BOI
- MCI
1 stop4h 36m
Delta
Deal found 5/5![Delta logo]()
$327
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/26:30 pm
MCI
- BOI
1 stop6h 00m
Southwest
Tue 6/95:30 am
BOI
- MCI
2 stops12h 45m
Southwest
Deal found 5/5![Southwest logo]()
$338
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/26:35 am
STL
- GEG
1 stop5h 40m
Southwest
Tue 6/91:35 pm
GEG
- STL
1 stop8h 10m
Southwest
Deal found 5/5![Southwest logo]()
$357
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/26:35 am
STL
- BOI
1 stop5h 20m
Southwest
Tue 6/93:00 pm
BOI
- STL
1 stop5h 50m
Southwest
Deal found 5/5![Southwest logo]()
$357
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.
Wed 6/37:40 pm
MCI
- GEG
1 stop5h 55m
Delta
Wed 6/175:10 pm
GEG
- MCI
1 stop5h 08m
Delta
Deal found 5/5![Delta logo]()
$360
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.
Wed 6/108:08 pm
STL
- BOI
1 stop17h 22m
Frontier
Sun 6/141:25 pm
BOI
- STL
1 stop28h 28m
Frontier
Deal found 5/1![Frontier logo]()
$261
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/107:55 pm
STL
- GEG
1 stop6h 04m
Delta
Tue 6/167:00 am
GEG
- STL
1 stop6h 17m
Delta
Deal found 5/2![Delta logo]()
$347
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.
Thu 6/182:55 pm
MCI
- JAC
1 stop5h 47m
Delta
Thu 6/256:05 pm
JAC
- MCI
1 stop5h 13m
Delta
Deal found 5/4![Delta logo]()
$329
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 May 6, 2026.
Search for one-way flight options from Missouri to Idaho. Find affordable one-way fares based on user searches. Data last updated May 6, 2026.
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/38:08 pm
STL
- BOI
1 stop17h 21m
Frontier
Deal found 5/5![Frontier logo]()
$136
This Trip.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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/238:08 pm
STL
- BOI
1 stop17h 22m
Frontier
Deal found 5/3![Frontier logo]()
$144
This 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/16:20 am
MCI
- BOI
1 stop5h 38m
Delta
Deal found 5/5![Delta logo]()
$164
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/136:16 pm
MCI
- IDA
2 stops46h 52m
Multiple Airlines
Deal found 5/5![Multiple Airlines logo]()
$165
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 6/85:37 pm
MCI
- BOI
1 stop7h 10m
Delta
Deal found 5/1![Delta logo]()
$166
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 10/63:11 pm
MCI
- IDA
1 stop8h 43m
Alaska Airlines
Deal found 5/5![Alaska Airlines logo]()
$170
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.
Wed 8/51:45 pm
MCI
- BOI
1 stop23h 44m
Frontier
Deal found 5/3![Frontier logo]()
$170
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.
Wed 8/126:42 am
STL
- GEG
1 stop7h 20m
American Airlines
Deal found 5/4![American Airlines logo]()
$174
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/55:00 pm
MCI
- IDA
1 stop22h 27m
Alaska Airlines
Deal found 5/2![Alaska Airlines logo]()
$175
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.
Wed 8/123:34 pm
STL
- GEG
2 stops30h 50m
Multiple Airlines
Deal found 5/3![Multiple Airlines logo]()
$175
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 5/307:00 am
STL
- GEG
1 stop8h 14m
American Airlines
Deal found 5/1![American Airlines logo]()
$179
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/35:25 am
STL
- BOI
1 stop6h 54m
American Airlines
Deal found 5/5![American Airlines logo]()
$179
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 May 6, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $261 (CheapOair) |
One-way from | $136 (CheapOair) |
Popular in | February |
Cheapest in | January |
Average price | $441 |
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 May 6, 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
Kansas CityBoise
MCI - BOI
MCIBOI
Kansas City
Tue 8/18
6:02 am-12:26 pm
1 stop7h 24m
Boise Air Term. Gowen Fld
Wed 8/19
6:00 am-12:38 pm
1 stop5h 38m
$307
SpringfieldBoise
SGF - BOI
SGFBOI
Springfield-Branson
Sat 8/29
5:40 am-9:35 am
1 stop4h 55m
Boise Air Term. Gowen Fld
Tue 9/1
5:44 pm-11:42 pm
1 stop4h 58m
$311
Kansas CityBoise
MCI - BOI
MCIBOI
Kansas City
Tue 8/25
6:28 am-1:42 pm
1 stop8h 14m
Boise Air Term. Gowen Fld
Tue 9/1
8:45 am-5:23 pm
1 stop7h 38m
$327
Kansas CityJackson
MCI - JAC
MCIJAC
Kansas City
Thu 6/18
2:55 pm-7:42 pm
1 stop5h 47m
Jackson Hole
Tue 6/23
6:05 pm-12:18 am
1 stop5h 13m
$329
Kansas CityJackson
MCI - JAC
MCIJAC
Kansas City
Sat 10/3
2:15 pm-6:57 pm
1 stop5h 42m
Jackson Hole
Wed 10/7
5:30 pm-12:21 am
1 stop5h 51m
$329
Kansas CityJackson
MCI - JAC
MCIJAC
Kansas City
Sat 5/16
6:00 am-9:42 am
1 stop4h 42m
Jackson Hole
Wed 5/20
4:15 pm-11:59 pm
1 stop6h 44m
$336
Kansas CitySpokane
MCI - GEG
MCIGEG
Kansas City
Tue 9/22
7:00 am-12:39 pm
1 stop7h 39m
Spokane
Wed 9/23
5:09 am-12:38 pm
1 stop5h 29m
$347
St. LouisBoise
STL - BOI
STLBOI
Lambert-St Louis
Tue 6/2
6:35 am-10:55 am
1 stop5h 20m
Boise Air Term. Gowen Fld
Tue 6/9
3:00 pm-9:50 pm
1 stop5h 50m
$357
Kansas CitySpokane
MCI - GEG
MCIGEG
Kansas City
Thu 5/28
7:40 pm-11:35 pm
1 stop5h 55m
Spokane
Mon 6/1
4:59 pm-12:25 am
1 stop5h 26m
$367
Kansas CitySpokane
MCI - GEG
MCIGEG
Kansas City
Sat 6/6
7:05 am-12:11 pm
1 stop7h 06m
Spokane
Mon 6/8
9:20 am-11:49 pm
2 stops12h 29m
$368
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.
STL-BOI
MCI-BOI
MCI-IDA
STL-GEG
MCI-GEG
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
STL-BOI
MCI-BOI
MCI-IDA
STL-GEG
How far ahead should I book a flight from Missouri to Idaho?
Booking 13 days in advance of your planned departure date is, on average, the best time to get cheap flights from Missouri to Idaho. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest month to book a flight from Missouri to Idaho?
Currently, May is the cheapest month in which you can book a flight from Missouri to Idaho (average of $89). Flying from Missouri to Idaho in January is currently the most expensive (average of $286). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
How much does it cost to fly round-trip from Missouri to Idaho?
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 May 6, 2026.
Get a feel of what it's like to fly with Alaska Airlines,Southwest, 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.
Food
7.1
Crew
8.5
Overall
7.9
Boarding
8.1
Entertainment
7.0
Comfort
7.8
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Food
7.1
Crew
8.5
Overall
7.9
Boarding
8.1
Entertainment
7.0
Comfort
7.8
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Food
7.1
Crew
8.5
Overall
7.9
Boarding
8.1
Entertainment
7.0
Comfort
7.8
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Food
7.1
Crew
8.5
Overall
7.9
Boarding
8.1
Entertainment
7.0
Comfort
7.8
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Food
7.1
Crew
8.5
Overall
7.9
Boarding
8.1
Entertainment
7.0
Comfort
7.8
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Food
7.1
Crew
8.5
Overall
7.9
Boarding
8.1
Entertainment
7.0
Comfort
7.8
Reviews
1 / 20
8.0
ExcellentEugene,Mar 2026
MFR - SEA
Related info for your journey
Find useful and relevant information for your journey from Missouri to Idaho. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
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Alternative routes for Missouri to Idaho
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Idaho by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Missouri to Idaho by cabin class
Find flights from Missouri to Idaho, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Missouri and Idaho flights
Browse other Missouri and Idaho flight options. Last updated on May 6, 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 May 6, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$133 | Average$370 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$186 | Average$426 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$232 | Average$388 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$236 | Average$474 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$266 | Average$459 | FlexibilityNo cancel fee | On-time63% |