$141+ 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 5/22. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — BOI
May 30 — Jun 61
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Montana to Idaho with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Montana to Idaho
Cheapest
Best
Last-minute
One-way
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 April 30, 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 April 30, 2026.
This Delta deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 4/28![Delta logo]()
$227
This Delta deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 10/25:45 am
BZN
- BOI
1 stop4h 28m
Delta
Sun 10/45:45 pm
BOI
- BZN
1 stop6h 14m
Delta
Deal found 4/28![Delta logo]()
$257
This Delta deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 5/315:35 am
BZN
- BOI
1 stop3h 57m
Delta
Fri 6/56:41 pm
BOI
- BZN
1 stop5h 18m
Delta
Deal found 4/28![Delta logo]()
$287
This Southwest deal was found by Cheapflights users on 4/25. 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.
Wed 6/38:10 am
BZN
- BOI
1 stop7h 15m
Southwest
Thu 6/47:40 pm
BOI
- BZN
1 stop5h 30m
Southwest
Deal found 4/25![Southwest logo]()
$290
This Delta deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” 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 8/135:45 am
BZN
- BOI
1 stop4h 28m
Delta
Sun 8/168:45 am
BOI
- BZN
1 stop6h 01m
Delta
Deal found 4/29![Delta logo]()
$293
This Alaska Airlines deal was found by Cheapflights users on 4/27. 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 5/276:00 am
BIL
- GEG
1 stop6h 42m
Alaska Airlines
Wed 5/271:59 pm
GEG
- BIL
1 stop8h 34m
Alaska Airlines
Deal found 4/27![Alaska Airlines logo]()
$299
This Southwest deal was found by Cheapflights users on 4/27. 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.
Thu 6/47:15 pm
BZN
- BOI
1 stop5h 55m
Southwest
Mon 6/84:25 pm
BOI
- BZN
2 stops8h 45m
Southwest
Deal found 4/27![Southwest logo]()
$302
This Alaska Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 5/301:52 pm
BZN
- BOI
1 stop4h 22m
Alaska Airlines
Thu 6/46:07 pm
BOI
- BZN
1 stop4h 35m
Alaska Airlines
Deal found 4/28![Alaska Airlines logo]()
$307
This Alaska Airlines deal was found by Cheapflights users on 4/25. 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 8/209:20 am
BZN
- GEG
1 stop14h 28m
Alaska Airlines
Mon 8/247:00 am
GEG
- BZN
1 stop12h 45m
Alaska Airlines
Deal found 4/25![Alaska Airlines logo]()
$313
This Orbitz deal was found by Cheapflights users on 4/25. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/166:58 pm
BZN
- BOI
1 stop5h 06m
Alaska Airlines
Wed 6/176:23 am
BOI
- BZN
1 stop7h 46m
Alaska Airlines
Deal found 4/25![Alaska Airlines logo]()
$314
This Southwest deal was found by Cheapflights users on 4/25. 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.
Mon 6/14:20 pm
BZN
- BOI
2 stops8h 25m
Southwest
Thu 6/47:40 pm
BOI
- BZN
1 stop5h 30m
Southwest
Deal found 4/25![Southwest logo]()
$318
This Alaska Airlines deal was found by Cheapflights users on 4/26. 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.
Sat 5/238:00 am
BZN
- GEG
1 stop4h 42m
Alaska Airlines
Wed 5/276:00 am
GEG
- BZN
1 stop4h 03m
Alaska Airlines
Deal found 4/26![Alaska Airlines logo]()
$321
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 April 30, 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 April 30, 2026.
This Delta deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” 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 8/75:15 am
BZN
- BOI
1 stop4h 14m
Delta
Mon 8/105:45 pm
BOI
- BZN
1 stop6h 14m
Delta
Deal found 4/29![Delta logo]()
$227
This Southwest deal was found by Cheapflights users on 4/25. 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.
Mon 6/14:20 pm
BZN
- BOI
2 stops8h 25m
Southwest
Thu 6/47:40 pm
BOI
- BZN
1 stop5h 30m
Southwest
Deal found 4/25![Southwest logo]()
$318
This Alaska Airlines deal was found by Cheapflights users on 4/26. 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.
Sat 5/238:00 am
BZN
- GEG
1 stop4h 42m
Alaska Airlines
Wed 5/276:00 am
GEG
- BZN
1 stop4h 03m
Alaska Airlines
Deal found 4/26![Alaska Airlines logo]()
$321
This United Airlines deal was found by Cheapflights users on 4/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/265:00 am
BIL
- BOI
1 stop4h 35m
United Airlines
Sun 8/3010:37 am
BOI
- BIL
1 stop6h 39m
United Airlines
Deal found 4/26![United Airlines logo]()
$415
This Delta deal was found by Cheapflights users on 4/26. 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.
Mon 6/15:35 am
BZN
- BOI
1 stop3h 57m
Delta
Sat 6/66:41 pm
BOI
- BZN
1 stop3h 30m
Delta
Deal found 4/26![Delta logo]()
$257
This Delta deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” 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 10/25:45 am
BZN
- BOI
1 stop4h 28m
Delta
Sun 10/45:45 pm
BOI
- BZN
1 stop6h 14m
Delta
Deal found 4/29![Delta logo]()
$257
This Southwest deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” 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 5/294:20 pm
BZN
- BOI
2 stops8h 25m
Southwest
Sat 5/301:55 pm
BOI
- BZN
1 stop5h 35m
Southwest
Deal found 4/29![Southwest logo]()
$333
This Alaska Airlines deal was found by Cheapflights users on 4/25. 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 5/238:02 pm
MSO
- BOI
1 stop3h 56m
Alaska Airlines
Wed 5/276:07 pm
BOI
- MSO
1 stop5h 52m
Alaska Airlines
Deal found 4/25![Alaska Airlines logo]()
$335
This Alaska Airlines deal was found by Cheapflights users on 4/26. 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 6/27:21 pm
BIL
- BOI
1 stop4h 37m
Alaska Airlines
Sat 6/66:07 pm
BOI
- BIL
1 stop5h 26m
Alaska Airlines
Deal found 4/26![Alaska Airlines logo]()
$337
This Southwest deal was found by Cheapflights users on 4/25. 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.
Tue 6/163:55 pm
BZN
- BOI
2 stops8h 30m
Southwest
Wed 6/174:20 pm
BOI
- BZN
2 stops8h 25m
Southwest
Deal found 4/25![Southwest logo]()
$345
This Delta deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” 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 5/266:19 pm
GTF
- BOI
1 stop5h 45m
Delta
Sat 5/306:41 pm
BOI
- GTF
1 stop3h 45m
Delta
Deal found 4/29![Delta logo]()
$326
This Expedia deal was found by Cheapflights users on 4/27. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/298:00 am
BZN
- GEG
1 stop4h 42m
Alaska Airlines
Sun 5/316:00 am
GEG
- BZN
1 stop4h 03m
Alaska Airlines
Deal found 4/27![Alaska Airlines logo]()
$341
This Southwest deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 6/14:20 pm
BZN
- BOI
2 stops8h 25m
Southwest
Mon 6/87:40 pm
BOI
- BZN
1 stop5h 30m
Southwest
Deal found 4/28![Southwest logo]()
$348
This Delta deal was found by Cheapflights users on 4/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/201:20 pm
FCA
- BOI
1 stop4h 30m
Delta
Sat 5/236:41 pm
BOI
- FCA
1 stop4h 33m
Delta
Deal found 4/27![Delta logo]()
$335
This Alaska Airlines deal was found by Cheapflights users on 4/27. 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.
Tue 8/181:50 pm
BZN
- GEG
1 stop10h 17m
Alaska Airlines
Wed 8/197:00 am
GEG
- BZN
1 stop12h 45m
Alaska Airlines
Deal found 4/27![Alaska Airlines logo]()
$346
This Southwest deal was found by Cheapflights users on 4/26. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/127:15 pm
BZN
- BOI
1 stop5h 55m
Southwest
Sun 6/142:10 pm
BOI
- BZN
1 stop10h 00m
Southwest
Deal found 4/26![Southwest logo]()
$352
This Alaska Airlines deal was found by Cheapflights users on 4/27. 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.
Tue 8/186:58 pm
BZN
- BOI
1 stop5h 06m
Alaska Airlines
Wed 8/194:17 pm
BOI
- BZN
1 stop6h 42m
Alaska Airlines
Deal found 4/27![Alaska Airlines logo]()
$347
This Delta deal was found by Cheapflights users on 4/25. 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 6/46:05 pm
MSO
- BOI
1 stop3h 39m
Delta
Mon 6/86:42 pm
BOI
- MSO
1 stop5h 46m
Delta
Deal found 4/25![Delta logo]()
$355
This Southwest deal was found by Cheapflights users on 4/26. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/25:45 am
BZN
- GEG
1 stop6h 50m
Southwest
Sun 10/47:00 am
GEG
- BZN
1 stop7h 35m
Southwest
Deal found 4/26![Southwest logo]()
$367
This Alaska Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 6/47:45 am
MSO
- GEG
1 stop4h 57m
Alaska Airlines
Sat 6/65:38 pm
GEG
- MSO
1 stop5h 21m
Alaska Airlines
Deal found 4/28![Alaska Airlines logo]()
$354
This Delta deal was found by Cheapflights users on 4/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/55:40 am
GTF
- BOI
1 stop3h 49m
Delta
Fri 8/711:53 am
BOI
- GTF
1 stop5h 50m
Delta
Deal found 4/27![Delta logo]()
$364
This Southwest deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” 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 10/235:45 am
BZN
- GEG
1 stop6h 50m
Southwest
Fri 10/305:15 am
GEG
- BZN
2 stops9h 20m
Southwest
Deal found 4/29![Southwest logo]()
$372
This Alaska Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” 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 5/235:40 pm
FCA
- BOI
1 stop4h 44m
Alaska Airlines
Wed 5/276:07 pm
BOI
- FCA
1 stop5h 51m
Alaska Airlines
Deal found 4/29![Alaska Airlines logo]()
$356
This Southwest deal was found by Cheapflights users on 4/25. 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.
Thu 8/203:30 pm
BZN
- GEG
2 stops8h 45m
Southwest
Mon 8/245:35 pm
GEG
- BZN
1 stop5h 05m
Southwest
Deal found 4/25![Southwest logo]()
$372
This Delta deal was found by Cheapflights users on 4/26. 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.
Wed 7/15:35 am
HLN
- BOI
1 stop6h 40m
Delta
Sun 7/56:42 pm
BOI
- HLN
1 stop3h 49m
Delta
Deal found 4/26![Delta logo]()
$375
This Alaska Airlines deal was found by Cheapflights users on 4/25. 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 6/26:52 pm
GTF
- BOI
1 stop20h 42m
Alaska Airlines
Sat 6/66:07 pm
BOI
- GTF
1 stop24h 05m
Alaska Airlines
Deal found 4/25![Alaska Airlines logo]()
$362
This United Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” 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 5/294:19 pm
MSO
- JAC
2 stops21h 29m
United Airlines
Tue 6/24:23 pm
JAC
- MSO
2 stops30h 13m
United Airlines
Deal found 4/29![United Airlines logo]()
$710
This Delta deal was found by Cheapflights users on 4/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/225:40 am
MSO
- BOI
1 stop4h 39m
Delta
Tue 10/2711:30 am
BOI
- MSO
1 stop5h 57m
Delta
Deal found 4/27![Delta logo]()
$375
This Southwest deal was found by Cheapflights users on 4/27. 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.
Mon 5/256:15 am
BZN
- BOI
1 stop5h 15m
Southwest
Mon 6/112:05 pm
BOI
- BZN
2 stops10h 00m
Southwest
Deal found 4/27![Southwest logo]()
$378
This Delta deal was found by Cheapflights users on 4/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/305:20 am
BIL
- BOI
1 stop4h 09m
Delta
Tue 8/46:42 pm
BOI
- BIL
1 stop4h 05m
Delta
Deal found 4/27![Delta logo]()
$375
Last-minute flights from Montana to IdahoDiscover last-minute flight deals from Montana to Idaho. Data last updated April 30, 2026 and is based on user searches.
Discover last-minute flight deals from Montana to Idaho. Data last updated April 30, 2026 and is based on user searches.
This Alaska Airlines deal was found by Cheapflights users on 4/26. 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.
Sat 5/238:00 am
BZN
- GEG
1 stop4h 42m
Alaska Airlines
Wed 5/276:00 am
GEG
- BZN
1 stop4h 03m
Alaska Airlines
Deal found 4/26![Alaska Airlines logo]()
$321
This Delta deal was found by Cheapflights users on 4/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/236:19 pm
GTF
- BOI
1 stop4h 45m
Delta
Tue 5/266:41 pm
BOI
- GTF
1 stop3h 45m
Delta
Deal found 4/27![Delta logo]()
$334
This Alaska Airlines deal was found by Cheapflights users on 4/27. 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.
Sat 5/237:45 am
MSO
- BOI
1 stop6h 25m
Alaska Airlines
Wed 5/276:07 pm
BOI
- MSO
1 stop5h 52m
Alaska Airlines
Deal found 4/27![Alaska Airlines logo]()
$335
This Delta deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” 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 5/266:19 pm
GTF
- BOI
1 stop5h 45m
Delta
Sat 5/306:41 pm
BOI
- GTF
1 stop3h 45m
Delta
Deal found 4/29![Delta logo]()
$326
This Alaska Airlines deal was found by Cheapflights users on 4/27. 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 5/276:00 am
BIL
- GEG
1 stop6h 42m
Alaska Airlines
Wed 5/271:59 pm
GEG
- BIL
1 stop8h 34m
Alaska Airlines
Deal found 4/27![Alaska Airlines logo]()
$299
This Delta deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” 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 5/291:00 pm
BZN
- BOI
1 stop4h 50m
Delta
Sat 5/306:41 pm
BOI
- BZN
1 stop3h 21m
Delta
Deal found 4/29![Delta logo]()
$257
This Southwest deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” 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 5/294:20 pm
BZN
- BOI
2 stops8h 25m
Southwest
Sat 5/301:55 pm
BOI
- BZN
1 stop5h 35m
Southwest
Deal found 4/29![Southwest logo]()
$333
This Delta deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 5/305:35 am
BZN
- BOI
1 stop3h 57m
Delta
Sat 6/66:41 pm
BOI
- BZN
1 stop3h 30m
Delta
Deal found 4/28![Delta logo]()
$227
This Delta deal was found by Cheapflights users on 4/26. 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.
Sat 5/305:35 am
BZN
- BOI
1 stop3h 57m
Delta
Fri 6/56:41 pm
BOI
- BZN
1 stop5h 18m
Delta
Deal found 4/26![Delta logo]()
$293
This Alaska Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 5/301:52 pm
BZN
- BOI
1 stop4h 22m
Alaska Airlines
Thu 6/46:07 pm
BOI
- BZN
1 stop4h 35m
Alaska Airlines
Deal found 4/28![Alaska Airlines logo]()
$307
This Delta deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 5/315:35 am
BZN
- BOI
1 stop3h 57m
Delta
Fri 6/56:41 pm
BOI
- BZN
1 stop5h 18m
Delta
Deal found 4/28![Delta logo]()
$287
This Southwest deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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.
Sun 5/315:25 am
BZN
- BOI
1 stop5h 55m
Southwest
Fri 6/54:25 pm
BOI
- BZN
2 stops8h 45m
Southwest
Deal found 4/28![Southwest logo]()
$326
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 April 30, 2026.
Search for one-way flight options from Montana to Idaho. Find affordable one-way fares based on user searches. Data last updated April 30, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/26. 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 5/222:46 pm
MSO
- BOI
1 stop22h 34m
Allegiant Air
Deal found 4/26![Allegiant Air logo]()
$141
This Delta deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 6/3012:13 pm
BZN
- BOI
1 stop4h 39m
Delta
Deal found 4/28![Delta logo]()
$144
This CheapOair deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 5/274:43 pm
HLN
- BOI
1 stop7h 15m
Alaska Airlines
Deal found 4/28![Alaska Airlines logo]()
$159
This Southwest deal was found by Cheapflights users on 4/26. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/2311:10 am
BZN
- BOI
2 stops9h 15m
Southwest
Deal found 4/26![Southwest logo]()
$162
This Southwest deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” 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 6/14:20 pm
BZN
- GEG
2 stops9h 10m
Southwest
Deal found 4/29![Southwest logo]()
$166
This Expedia deal was found by Cheapflights users on 4/27. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/268:02 pm
MSO
- BOI
1 stop3h 56m
Alaska Airlines
Deal found 4/27![Alaska Airlines logo]()
$168
This Delta deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 5/265:30 am
BIL
- BOI
1 stop4h 02m
Delta
Deal found 4/28![Delta logo]()
$169
This Delta deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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 7/11:20 pm
GTF
- BOI
1 stop3h 32m
Delta
Deal found 4/28![Delta logo]()
$172
This Southwest deal was found by Cheapflights users on 4/27. 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.
Sat 5/1611:10 am
BZN
- BOI
2 stops9h 15m
Southwest
Deal found 4/27![Southwest logo]()
$173
This Delta deal was found by Cheapflights users on 4/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/165:35 am
BZN
- BOI
1 stop3h 57m
Delta
Deal found 4/27![Delta logo]()
$174
This Southwest deal was found by Cheapflights users on 4/27. 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.
Mon 5/184:20 pm
BZN
- GEG
2 stops9h 15m
Southwest
Deal found 4/27![Southwest logo]()
$176
This Alaska Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” 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.
Sun 5/316:52 pm
GTF
- BOI
1 stop5h 06m
Alaska Airlines
Deal found 4/28![Alaska Airlines logo]()
$177
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 April 30, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $227 (Delta) |
One-way from | $141 (Kiwi.com) |
Popular in | September |
Cheapest in | March |
Average price | $217 |
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 April 30, 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
Fri 8/7
5:15 am-9:29 am
1 stop4h 14m
Boise Air Term. Gowen Fld
Mon 8/10
5:45 pm-11:59 pm
1 stop6h 14m
$227
Quickest round-trip
BozemanBoise
BZN - BOI
BZNBOI
Bozeman Gallatin Field
Mon 6/1
5:35 am-9:32 am
1 stop3h 57m
Boise Air Term. Gowen Fld
Sat 6/6
6:41 pm-10:11 pm
1 stop3h 30m
$257
BozemanBoise
BZN - BOI
BZNBOI
Bozeman Gallatin Field
Fri 10/2
5:45 am-10:13 am
1 stop4h 28m
Boise Air Term. Gowen Fld
Sun 10/4
5:45 pm-11:59 pm
1 stop6h 14m
$257
BozemanBoise
BZN - BOI
BZNBOI
Bozeman Gallatin Field
Mon 6/1
4:20 pm-12:45 am
2 stops8h 25m
Boise Air Term. Gowen Fld
Thu 6/4
7:40 pm-1:10 am
1 stop5h 30m
$318
BozemanSpokane
BZN - GEG
BZNGEG
Bozeman Gallatin Field
Sat 5/23
8:00 am-11:42 am
1 stop4h 42m
Spokane
Wed 5/27
6:00 am-11:03 am
1 stop4h 03m
$321
Great FallsBoise
GTF - BOI
GTFBOI
Great Falls
Tue 5/26
6:19 pm-12:04 am
1 stop5h 45m
Boise Air Term. Gowen Fld
Sat 5/30
6:41 pm-10:26 pm
1 stop3h 45m
$326
BozemanBoise
BZN - BOI
BZNBOI
Bozeman Gallatin Field
Fri 5/29
4:20 pm-12:45 am
2 stops8h 25m
Boise Air Term. Gowen Fld
Sat 5/30
1:55 pm-7:30 pm
1 stop5h 35m
$333
MissoulaBoise
MSO - BOI
MSOBOI
Missoula Johnson-Bell Field
Sat 5/23
8:02 pm-11:58 pm
1 stop3h 56m
Boise Air Term. Gowen Fld
Wed 5/27
6:07 pm-11:59 pm
1 stop5h 52m
$335
KalispellBoise
FCA - BOI
FCABOI
Kalispell Glacier Park
Wed 5/20
1:20 pm-5:50 pm
1 stop4h 30m
Boise Air Term. Gowen Fld
Sat 5/23
6:41 pm-11:14 pm
1 stop4h 33m
$335
BillingsBoise
BIL - BOI
BILBOI
Billings Logan Intl
Tue 6/2
7:21 pm-11:58 pm
1 stop4h 37m
Boise Air Term. Gowen Fld
Sat 6/6
6:07 pm-11:33 pm
1 stop5h 26m
$337
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
BIL-GEG
BZN-GEG
GTF-BOI
MSO-BOI
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Montana to Idaho
USMT-USID
BZN-BOI
BIL-GEG
BZN-GEG
GTF-BOI
What is the cheapest month to book a flight from Montana to Idaho?
Currently, July is the cheapest month in which you can book a flight from Montana to Idaho (average of $65). Flying from Montana to Idaho in June is currently the most expensive (average of $181). 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 April 30, 2026.
Read through reviews of airlines operating flights from Montana to Idaho, such as Southwest,Alaska Airlines, andDelta. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
8.0
Overall
8.0
Entertainment
7.5
Boarding
8.1
Crew
8.6
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Overall
8.0
Entertainment
7.5
Boarding
8.1
Crew
8.6
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Overall
8.0
Entertainment
7.5
Boarding
8.1
Crew
8.6
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Overall
8.0
Entertainment
7.5
Boarding
8.1
Crew
8.6
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Overall
8.0
Entertainment
7.5
Boarding
8.1
Crew
8.6
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
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.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Popular flights
Return Flight Options
Top destinations
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 April 30, 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 April 30, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$117 | Average$318 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$132 | Average$437 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$148 | Average$374 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$158 | Average$387 | FlexibilityNo cancel fee | On-time63% |