$129+ Cheap flights from Montana 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 10/8. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — BOI
Jul 28 — Aug 41
Round-trip
1 adult, Economy
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Cheapest flights from Montana to IdahoExplore the most affordable flight options available from Montana to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 28, 2026.
Explore the most affordable flight options available from Montana to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 28, 2026.
This Delta deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/206:00 am
BZN
- BOI
1 stop3h 48m
Delta
Sun 8/236:45 pm
BOI
- BZN
1 stop5h 19m
Delta
Deal found 6/23![Delta logo]()
$187
This Alaska Airlines deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” 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 10/85:43 pm
BZN
- BOI
Nonstop1h 12m
Alaska Airlines
Fri 10/97:37 pm
BOI
- BZN
1 stop16h 24m
Alaska Airlines
Deal found 6/24![Alaska Airlines logo]()
$235
This Delta deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” 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 7/245:15 am
BZN
- BOI
1 stop4h 14m
Delta
Sun 7/266:00 am
BOI
- BZN
1 stop5h 17m
Delta
Deal found 6/26![Delta logo]()
$237
This Delta deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” 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 7/237:30 pm
BZN
- BOI
1 stop4h 35m
Delta
Mon 7/276:42 pm
BOI
- BZN
1 stop5h 41m
Delta
Deal found 6/24![Delta logo]()
$267
This Delta deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/145:15 am
BZN
- BOI
1 stop4h 14m
Delta
Mon 7/206:42 pm
BOI
- BZN
1 stop5h 41m
Delta
Deal found 6/25![Delta logo]()
$272
This Delta deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/213:54 pm
BZN
- GEG
1 stop6h 19m
Delta
Tue 7/284:30 pm
GEG
- BZN
1 stop5h 19m
Delta
Deal found 6/23![Delta logo]()
$287
This Southwest deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/307:15 pm
BZN
- BOI
1 stop6h 00m
Southwest
Sat 8/15:10 pm
BOI
- BZN
1 stop4h 50m
Southwest
Deal found 6/23![Southwest logo]()
$287
This Delta deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/133:49 pm
BZN
- GEG
1 stop4h 25m
Delta
Sat 8/225:40 pm
GEG
- BZN
1 stop4h 02m
Delta
Deal found 6/23![Delta logo]()
$295
This Delta deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” 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 7/305:15 am
BZN
- BOI
1 stop4h 14m
Delta
Fri 7/316:42 pm
BOI
- BZN
1 stop5h 41m
Delta
Deal found 6/25![Delta logo]()
$297
This Southwest deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/205:05 pm
BZN
- BOI
1 stop6h 30m
Southwest
Sun 8/236:30 am
BOI
- BZN
2 stops8h 55m
Southwest
Deal found 6/23![Southwest logo]()
$302
This Alaska Airlines deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” 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 10/273:35 pm
BZN
- GEG
1 stop4h 14m
Alaska Airlines
Thu 10/298:21 am
GEG
- BZN
1 stop4h 01m
Alaska Airlines
Deal found 6/24![Alaska Airlines logo]()
$321
This Alaska Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” 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 11/74:41 pm
HLN
- BOI
1 stop7h 10m
Alaska Airlines
Wed 11/1110:49 am
BOI
- HLN
1 stop5h 15m
Alaska Airlines
Deal found 6/25![Alaska Airlines logo]()
$323
Best flights from Montana to IdahoDiscover carefully curated flight deals from Montana to Idaho that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 28, 2026.
Discover carefully curated flight deals from Montana to Idaho that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 28, 2026.
This Delta deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/206:00 am
BZN
- BOI
1 stop3h 48m
Delta
Sun 8/236:45 pm
BOI
- BZN
1 stop5h 19m
Delta
Deal found 6/25![Delta logo]()
$187
This Southwest deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/307:15 pm
BZN
- BOI
1 stop6h 00m
Southwest
Sat 8/15:10 pm
BOI
- BZN
1 stop4h 50m
Southwest
Deal found 6/23![Southwest logo]()
$287
This Alaska Airlines deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” 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 9/19:20 am
BZN
- BOI
1 stop28h 42m
Alaska Airlines
Sat 9/56:49 pm
BOI
- BZN
1 stop25h 56m
Alaska Airlines
Deal found 6/23![Alaska Airlines logo]()
$308
This Kiwi.com deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” 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 10/810:17 am
MSO
- GEG
1 stop6h 17m
Allegiant Air
Mon 10/126:44 pm
GEG
- MSO
1 stop15h 45m
Allegiant Air
Deal found 6/23![Allegiant Air logo]()
$349
This Delta deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” 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 7/315:15 am
BZN
- BOI
1 stop4h 14m
Delta
Sat 8/15:15 pm
BOI
- BZN
1 stop4h 48m
Delta
Deal found 6/23![Delta logo]()
$237
This Delta deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” 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 7/237:30 pm
BZN
- BOI
1 stop4h 35m
Delta
Mon 7/276:42 pm
BOI
- BZN
1 stop5h 41m
Delta
Deal found 6/24![Delta logo]()
$267
This Southwest deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” 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 9/187:20 am
BZN
- BOI
1 stop6h 55m
Southwest
Sun 9/207:00 am
BOI
- BZN
1 stop8h 25m
Southwest
Deal found 6/27![Southwest logo]()
$297
This Alaska Airlines deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” 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 10/273:35 pm
BZN
- GEG
1 stop4h 14m
Alaska Airlines
Thu 10/298:21 am
GEG
- BZN
1 stop4h 01m
Alaska Airlines
Deal found 6/23![Alaska Airlines logo]()
$321
This Southwest deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” 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 8/142:30 pm
BZN
- BOI
1 stop6h 10m
Southwest
Sun 8/167:00 am
BOI
- BZN
1 stop8h 25m
Southwest
Deal found 6/24![Southwest logo]()
$297
This Delta deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/213:54 pm
BZN
- GEG
1 stop6h 19m
Delta
Tue 7/284:30 pm
GEG
- BZN
1 stop5h 19m
Delta
Deal found 6/23![Delta logo]()
$287
This Alaska Airlines deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” 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 11/74:41 pm
HLN
- BOI
1 stop7h 10m
Alaska Airlines
Wed 11/1110:49 am
BOI
- HLN
1 stop5h 15m
Alaska Airlines
Deal found 6/23![Alaska Airlines logo]()
$323
This Southwest deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/237:15 pm
BZN
- BOI
1 stop6h 00m
Southwest
Mon 7/276:00 am
BOI
- BZN
2 stops9h 55m
Southwest
Deal found 6/24![Southwest logo]()
$302
This Delta deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” 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 8/43:49 pm
BZN
- GEG
1 stop6h 27m
Delta
Thu 8/65:40 pm
GEG
- BZN
1 stop4h 02m
Delta
Deal found 6/23![Delta logo]()
$295
This Alaska Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” 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 11/34:57 pm
GTF
- BOI
1 stop6h 54m
Alaska Airlines
Sat 11/710:49 am
BOI
- GTF
1 stop5h 28m
Alaska Airlines
Deal found 6/25![Alaska Airlines logo]()
$347
This Delta deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/133:49 pm
BZN
- GEG
1 stop4h 25m
Delta
Sat 8/225:40 pm
GEG
- BZN
1 stop4h 02m
Delta
Deal found 6/23![Delta logo]()
$295
This Southwest deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/42:00 pm
BZN
- GEG
2 stops9h 05m
Southwest
Thu 8/65:10 pm
GEG
- BZN
1 stop5h 30m
Southwest
Deal found 6/23![Southwest logo]()
$335
This Alaska Airlines deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” 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 11/116:30 am
FCA
- BOI
1 stop5h 52m
Alaska Airlines
Sat 11/148:20 am
BOI
- FCA
1 stop4h 00m
Alaska Airlines
Deal found 6/23![Alaska Airlines logo]()
$355
This Delta deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” 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 10/26:00 am
BZN
- BOI
1 stop3h 51m
Delta
Sun 10/46:44 pm
BOI
- BZN
1 stop5h 31m
Delta
Deal found 6/23![Delta logo]()
$313
This Alaska Airlines deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” 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 9/1512:18 pm
BIL
- BOI
1 stop5h 49m
Alaska Airlines
Tue 9/226:23 am
BOI
- BIL
1 stop5h 15m
Alaska Airlines
Deal found 6/23![Alaska Airlines logo]()
$355
This Alaska Airlines deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” 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 11/114:57 pm
GTF
- BOI
1 stop6h 54m
Alaska Airlines
Sat 11/1410:49 am
BOI
- GTF
1 stop5h 28m
Alaska Airlines
Deal found 6/27![Alaska Airlines logo]()
$358
This United Airlines deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” 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 11/176:15 am
MSO
- JAC
1 stop7h 14m
United Airlines
Wed 11/187:00 am
JAC
- MSO
1 stop9h 19m
United Airlines
Deal found 6/23![United Airlines logo]()
$1,243
This Delta deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” 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 8/261:16 pm
MSO
- BOI
1 stop4h 39m
Delta
Sat 8/291:06 pm
BOI
- MSO
1 stop4h 40m
Delta
Deal found 6/23![Delta logo]()
$355
This Alaska Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” 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 10/276:01 am
BIL
- BOI
1 stop6h 34m
Alaska Airlines
Sat 10/318:25 am
BOI
- BIL
1 stop10h 27m
Alaska Airlines
Deal found 6/25![Alaska Airlines logo]()
$359
This Delta deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/155:30 am
BIL
- BOI
1 stop4h 21m
Delta
Tue 9/226:44 pm
BOI
- BIL
1 stop3h 50m
Delta
Deal found 6/23![Delta logo]()
$355
This Alaska Airlines deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” 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 8/267:15 am
MSO
- BOI
1 stop10h 52m
Alaska Airlines
Sat 8/296:23 am
BOI
- MSO
1 stop8h 54m
Alaska Airlines
Deal found 6/24![Alaska Airlines logo]()
$373
This Delta deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/135:40 am
GTF
- BOI
1 stop4h 08m
Delta
Tue 8/186:45 pm
BOI
- GTF
1 stop3h 53m
Delta
Deal found 6/23![Delta logo]()
$364
This Travelocity deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/275:18 pm
HLN
- BOI
1 stop5h 20m
Alaska Airlines
Thu 10/18:03 am
BOI
- HLN
1 stop8h 38m
Alaska Airlines
Deal found 6/23![Alaska Airlines logo]()
$373
This Alaska Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” 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 10/176:01 am
BIL
- GEG
1 stop4h 45m
Alaska Airlines
Wed 10/218:21 am
GEG
- BIL
1 stop5h 43m
Alaska Airlines
Deal found 6/25![Alaska Airlines logo]()
$374
This Delta deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” 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.
Sun 7/265:20 am
BIL
- BOI
1 stop4h 09m
Delta
Tue 8/46:45 pm
BOI
- BIL
1 stop3h 40m
Delta
Deal found 6/26![Delta logo]()
$375
This Alaska Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” 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 10/292:06 pm
MSO
- BOI
1 stop6h 00m
Alaska Airlines
Sat 10/316:40 am
BOI
- MSO
2 stops6h 46m
Alaska Airlines
Deal found 6/25![Alaska Airlines logo]()
$394
Last-minute flights from Montana to IdahoDiscover last-minute flight deals from Montana to Idaho. Data last updated June 28, 2026 and is based on user searches.
Discover last-minute flight deals from Montana to Idaho. Data last updated June 28, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” 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 7/95:15 am
BZN
- BOI
1 stop4h 14m
Delta
Sat 7/111:05 pm
BOI
- BZN
1 stop4h 09m
Delta
Deal found 6/23![Delta logo]()
$307
This Delta deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” 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 7/105:15 am
BZN
- BOI
1 stop4h 14m
Delta
Sun 7/126:00 am
BOI
- BZN
1 stop5h 17m
Delta
Deal found 6/23![Delta logo]()
$337
This Delta deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/145:15 am
BZN
- BOI
1 stop4h 14m
Delta
Mon 7/206:42 pm
BOI
- BZN
1 stop5h 41m
Delta
Deal found 6/25![Delta logo]()
$272
This Delta deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/213:54 pm
BZN
- GEG
1 stop6h 19m
Delta
Tue 7/284:30 pm
GEG
- BZN
1 stop5h 19m
Delta
Deal found 6/23![Delta logo]()
$287
This Delta deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” 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 7/237:30 pm
BZN
- BOI
1 stop4h 35m
Delta
Mon 7/276:42 pm
BOI
- BZN
1 stop5h 41m
Delta
Deal found 6/24![Delta logo]()
$267
This Southwest deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/237:15 pm
BZN
- BOI
1 stop6h 00m
Southwest
Mon 7/276:00 am
BOI
- BZN
2 stops9h 55m
Southwest
Deal found 6/24![Southwest logo]()
$302
This Delta deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” 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 7/245:15 am
BZN
- BOI
1 stop4h 14m
Delta
Sun 7/266:00 am
BOI
- BZN
1 stop5h 17m
Delta
Deal found 6/26![Delta logo]()
$237
This Kiwi.com deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/2410:04 am
BIL
- GEG
2 stops54h 49m
Multiple Airlines
Fri 7/3111:58 am
GEG
- BIL
1 stop25h 52m
Multiple Airlines
Deal found 6/24![Multiple Airlines logo]()
$366
This Southwest deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/307:15 pm
BZN
- BOI
1 stop6h 00m
Southwest
Sat 8/15:10 pm
BOI
- BZN
1 stop4h 50m
Southwest
Deal found 6/23![Southwest logo]()
$287
This Delta deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” 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 7/305:15 am
BZN
- BOI
1 stop4h 14m
Delta
Fri 7/316:42 pm
BOI
- BZN
1 stop5h 41m
Delta
Deal found 6/25![Delta logo]()
$297
This Southwest deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” 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 7/314:30 pm
BZN
- BOI
2 stops8h 45m
Southwest
Sat 8/112:55 pm
BOI
- BZN
2 stops9h 05m
Southwest
Deal found 6/23![Southwest logo]()
$332
This Southwest deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” 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 7/317:15 pm
BZN
- BOI
1 stop6h 00m
Southwest
Wed 8/56:00 am
BOI
- BZN
2 stops8h 40m
Southwest
Deal found 6/24![Southwest logo]()
$333
One-way flights from Montana to IdahoSearch for one-way flight options from Montana to Idaho. Find affordable one-way fares based on user searches. Data last updated June 28, 2026.
Search for one-way flight options from Montana to Idaho. Find affordable one-way fares based on user searches. Data last updated June 28, 2026.
This Delta deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” 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 10/85:45 am
BZN
- BOI
1 stop4h 34m
Delta
Deal found 6/25![Delta logo]()
$129
This Delta deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/223:54 pm
BZN
- GEG
1 stop4h 21m
Delta
Deal found 6/24![Delta logo]()
$144
This Southwest deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/237:15 pm
BZN
- BOI
1 stop6h 00m
Southwest
Deal found 6/23![Southwest logo]()
$149
This Kiwi.com deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2810:26 am
BZN
- GEG
2 stops47h 56m
Multiple Airlines
Deal found 6/26![Multiple Airlines logo]()
$153
This Alaska Airlines deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” 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 8/183:05 pm
BZN
- BOI
1 stop6h 02m
Alaska Airlines
Deal found 6/26![Alaska Airlines logo]()
$169
This Delta deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” 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 8/115:40 am
GTF
- BOI
1 stop4h 08m
Delta
Deal found 6/26![Delta logo]()
$172
This Southwest deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” 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 9/47:20 am
BZN
- BOI
2 stops7h 45m
Southwest
Deal found 6/24![Southwest logo]()
$173
This Delta deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” 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 9/183:38 pm
BZN
- GEG
1 stop4h 12m
Delta
Deal found 6/25![Delta logo]()
$178
This Southwest deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/147:00 pm
BZN
- BOI
1 stop5h 30m
Southwest
Deal found 6/27![Southwest logo]()
$180
This Southwest deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” 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 9/187:20 am
BZN
- GEG
2 stops8h 40m
Southwest
Deal found 6/25![Southwest logo]()
$183
This Priceline deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/287:03 am
BZN
- GEG
1 stop6h 28m
Alaska Airlines
Deal found 6/26![Alaska Airlines logo]()
$184
This Delta deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” 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 7/105:15 am
BZN
- BOI
1 stop4h 14m
Delta
Deal found 6/26![Delta logo]()
$184
Find flight deals from Montana to Idaho
Keep the following information in mind while searching for Montana to Idaho flight deals. Data was last updated June 28, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $187 (Delta) |
One-way from | $129 (Delta) |
Popular in | June |
Cheapest in | March |
Average price | $551 |
Cheapflights Fare Finder
Customize your flight search to find flights from Montana 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 June 28, 2026.
Use the filters below to find and compare flights from Montana to Idaho that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
BozemanBoise
BZN - BOI
BZNBOI
Bozeman Gallatin Field
Thu 8/20
6:00 am-9:48 am
1 stop3h 48m
Boise Air Term. Gowen Fld
Sun 8/23
6:45 pm-12:04 am
1 stop5h 19m
$187
BozemanBoise
BZN - BOI
BZNBOI
Bozeman Gallatin Field
Fri 7/31
5:15 am-9:29 am
1 stop4h 14m
Boise Air Term. Gowen Fld
Sat 8/1
5:15 pm-10:03 pm
1 stop4h 48m
$237
BozemanBoise
BZN - BOI
BZNBOI
Bozeman Gallatin Field
Thu 7/23
7:30 pm-12:05 am
1 stop4h 35m
Boise Air Term. Gowen Fld
Mon 7/27
6:42 pm-12:23 am
1 stop5h 41m
$267
BozemanBoise
BZN - BOI
BZNBOI
Bozeman Gallatin Field
Thu 7/30
7:15 pm-1:15 am
1 stop6h 00m
Boise Air Term. Gowen Fld
Sat 8/1
5:10 pm-10:00 pm
1 stop4h 50m
$287
BozemanSpokane
BZN - GEG
BZNGEG
Bozeman Gallatin Field
Tue 7/21
3:54 pm-9:13 pm
1 stop6h 19m
Spokane
Tue 7/28
4:30 pm-10:49 pm
1 stop5h 19m
$287
BozemanSpokane
BZN - GEG
BZNGEG
Bozeman Gallatin Field
Tue 8/4
3:49 pm-9:16 pm
1 stop6h 27m
Spokane
Thu 8/6
5:40 pm-10:42 pm
1 stop4h 02m
$295
BozemanSpokane
BZN - GEG
BZNGEG
Bozeman Gallatin Field
Thu 8/13
3:49 pm-7:14 pm
1 stop4h 25m
Spokane
Sat 8/22
5:40 pm-10:42 pm
1 stop4h 02m
$295
BozemanBoise
BZN - BOI
BZNBOI
Bozeman Gallatin Field
Fri 9/18
7:20 am-2:15 pm
1 stop6h 55m
Boise Air Term. Gowen Fld
Sun 9/20
7:00 am-3:25 pm
1 stop8h 25m
$297
BozemanBoise
BZN - BOI
BZNBOI
Bozeman Gallatin Field
Fri 8/14
2:30 pm-8:40 pm
1 stop6h 10m
Boise Air Term. Gowen Fld
Sun 8/16
7:00 am-3:25 pm
1 stop8h 25m
$297
BozemanBoise
BZN - BOI
BZNBOI
Bozeman Gallatin Field
Thu 7/23
7:15 pm-1:15 am
1 stop6h 00m
Boise Air Term. Gowen Fld
Mon 7/27
6:00 am-3:55 pm
2 stops9h 55m
$302
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Montana to Idaho
Have a flexible travel schedule? Discover the best time to fly to Idaho from Montana with our price prediction graph.
BZN-BOI
BZN-GEG
GTF-BOI
BIL-GEG
MSO-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 Montana to Idaho
USMT-USID
BZN-BOI
BZN-GEG
GTF-BOI
BIL-GEG
What is the cheapest month to book a flight from Montana to Idaho?
Currently, October is the cheapest month in which you can book a flight from Montana to Idaho (average of $109). Flying from Montana to Idaho in July is currently the most expensive (average of $197). 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 Montana 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 June 28, 2026.
Read through reviews of airlines operating flights from Montana to Idaho, such as Alaska Airlines,Southwest, andDelta. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
7.8
Overall
7.9
Boarding
8.1
Crew
8.5
Food
7.0
Entertainment
7.0
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Comfort
7.8
Overall
7.9
Boarding
8.1
Crew
8.5
Food
7.0
Entertainment
7.0
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Comfort
7.8
Overall
7.9
Boarding
8.1
Crew
8.5
Food
7.0
Entertainment
7.0
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Comfort
7.8
Overall
7.9
Boarding
8.1
Crew
8.5
Food
7.0
Entertainment
7.0
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Comfort
7.8
Overall
7.9
Boarding
8.1
Crew
8.5
Food
7.0
Entertainment
7.0
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Related info for your journey
Find useful and relevant information for your journey from Montana 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 Montana 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 Montana to Idaho by cabin class
Find flights from Montana to Idaho, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Montana and Idaho flights
Browse other Montana and Idaho flight options. Last updated on June 28, 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 Montana after your stay in Idaho
Montana to Idaho flights
Consider these flights traveling from Montana to Idaho.
Top 4 airlines flying from Montana to Idaho
Discover the top 4 airlines that operate flights from Montana 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 June 28, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$117 | Average$329 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$132 | Average$432 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$148 | Average$394 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$158 | Average$387 | FlexibilityNo cancel fee | On-time63% |