$139+ Cheap flights from Montana to Ontario (ONT)
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 9/20. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — ONT
Aug 5 — Aug 121
Round-trip
1 adult, Economy
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Cheapest flights from Montana to OntarioExplore the most affordable flight options available from Montana to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 6, 2026.
Explore the most affordable flight options available from Montana to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 6, 2026.
This Delta deal was found by Cheapflights users on 7/6. 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.
Fri 9/256:00 pm
FCA
- ONT
1 stop6h 47m
Delta
Mon 9/289:52 am
ONT
- FCA
1 stop6h 26m
Delta
Deal found 7/6![Delta logo]()
$277
This Delta deal was found by Cheapflights users on 7/6. 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.
Thu 8/275:15 am
FCA
- ONT
1 stop4h 37m
Delta
Mon 8/316:00 am
ONT
- FCA
1 stop4h 09m
Delta
Deal found 7/6![Delta logo]()
$296
This Delta deal was found by Cheapflights users on 7/3. 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 8/126:00 am
BZN
- ONT
1 stop3h 52m
Delta
Mon 11/236:00 am
ONT
- BZN
1 stop5h 23m
Delta
Deal found 7/3![Delta logo]()
$311
This Delta deal was found by Cheapflights users on 7/5. 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 8/115:20 am
BIL
- ONT
1 stop4h 32m
Delta
Thu 8/135:05 pm
ONT
- BIL
1 stop4h 20m
Delta
Deal found 7/5![Delta logo]()
$311
This Delta deal was found by Cheapflights users on 7/3. 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.
Thu 9/246:00 am
BZN
- ONT
1 stop4h 02m
Delta
Sat 9/266:00 am
ONT
- BZN
1 stop5h 03m
Delta
Deal found 7/3![Delta logo]()
$312
This Delta deal was found by Cheapflights users on 7/3. 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.
Thu 11/57:15 am
HLN
- ONT
1 stop6h 07m
Delta
Mon 11/95:05 pm
ONT
- HLN
1 stop4h 36m
Delta
Deal found 7/3![Delta logo]()
$319
This Delta deal was found by Cheapflights users on 7/6. 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.
Thu 8/205:15 am
FCA
- ONT
1 stop4h 37m
Delta
Mon 8/246:00 am
ONT
- FCA
1 stop4h 09m
Delta
Deal found 7/6![Delta logo]()
$322
This Alaska Airlines deal was found by Cheapflights users on 7/6. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/76:03 am
BZN
- ONT
1 stop6h 11m
Alaska Airlines
Tue 8/116:02 am
ONT
- BZN
1 stop7h 07m
Alaska Airlines
Deal found 7/6![Alaska Airlines logo]()
$325
This Delta deal was found by Cheapflights users on 7/3. 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.
Tue 8/116:00 am
BZN
- ONT
1 stop3h 52m
Delta
Fri 11/206:00 am
ONT
- BZN
1 stop5h 23m
Delta
Deal found 7/3![Delta logo]()
$327
This Southwest deal was found by Cheapflights users on 7/5. 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.
Thu 8/203:30 pm
BZN
- ONT
1 stop7h 40m
Southwest
Sat 8/2210:35 am
ONT
- BZN
2 stops8h 30m
Southwest
Deal found 7/5![Southwest logo]()
$330
This Alaska Airlines deal was found by Cheapflights users on 7/6. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/76:03 am
BZN
- ONT
1 stop6h 11m
Alaska Airlines
Fri 8/72:05 pm
ONT
- BZN
1 stop8h 14m
Alaska Airlines
Deal found 7/6![Alaska Airlines logo]()
$333
This Booking.com deal was found by Cheapflights users on 7/3. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/127:32 pm
BIL
- ONT
1 stop15h 49m
Alaska Airlines
Wed 10/142:13 pm
ONT
- BIL
1 stop8h 37m
Alaska Airlines
Deal found 7/3![Alaska Airlines logo]()
$336
Best flights from Montana to OntarioDiscover carefully curated flight deals from Montana to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 6, 2026.
Discover carefully curated flight deals from Montana to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 6, 2026.
This Delta deal was found by Cheapflights users on 7/6. 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.
Thu 8/275:15 am
FCA
- ONT
1 stop4h 37m
Delta
Mon 8/316:00 am
ONT
- FCA
1 stop4h 09m
Delta
Deal found 7/6![Delta logo]()
$296
This Alaska Airlines deal was found by Cheapflights users on 7/4. 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 9/297:03 am
BZN
- ONT
1 stop8h 13m
Alaska Airlines
Wed 9/303:14 pm
ONT
- BZN
1 stop6h 45m
Alaska Airlines
Deal found 7/4![Alaska Airlines logo]()
$311
This Southwest deal was found by Cheapflights users on 7/2. 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.
Thu 9/243:30 pm
BZN
- ONT
2 stops7h 15m
Southwest
Sun 9/274:35 pm
ONT
- BZN
1 stop7h 05m
Southwest
Deal found 7/2![Southwest logo]()
$344
This United Airlines deal was found by Cheapflights users on 7/4. 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.
Fri 8/285:07 am
BIL
- ONT
2 stops8h 05m
United Airlines
Sat 8/2911:00 am
ONT
- BIL
2 stops10h 07m
United Airlines
Deal found 7/4![United Airlines logo]()
$499
This Delta deal was found by Cheapflights users on 7/2. 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.
Fri 10/95:40 am
BZN
- ONT
1 stop4h 15m
Delta
Sun 10/119:45 am
ONT
- BZN
1 stop7h 13m
Delta
Deal found 7/2![Delta logo]()
$311
This Delta deal was found by Cheapflights users on 7/3. 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.
Thu 8/277:39 pm
BZN
- ONT
1 stop4h 55m
Delta
Sun 8/306:00 am
ONT
- BZN
1 stop5h 05m
Delta
Deal found 7/3![Delta logo]()
$311
This Delta deal was found by Cheapflights users on 7/2. 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.
Fri 10/235:40 am
BZN
- ONT
1 stop4h 15m
Delta
Sun 11/16:00 am
ONT
- BZN
1 stop5h 05m
Delta
Deal found 7/2![Delta logo]()
$311
This Alaska Airlines deal was found by Cheapflights users on 7/1. 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.
Thu 11/54:41 pm
HLN
- ONT
1 stop7h 13m
Alaska Airlines
Mon 11/95:52 pm
ONT
- HLN
2 stops21h 12m
Alaska Airlines
Deal found 7/1![Alaska Airlines logo]()
$396
This Delta deal was found by Cheapflights users on 7/3. 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 8/126:00 am
BZN
- ONT
1 stop3h 52m
Delta
Wed 11/255:05 pm
ONT
- BZN
1 stop6h 05m
Delta
Deal found 7/3![Delta logo]()
$311
This Delta deal was found by Cheapflights users on 7/5. 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.
Fri 9/47:39 pm
BZN
- ONT
1 stop4h 55m
Delta
Mon 9/71:06 pm
ONT
- BZN
1 stop4h 39m
Delta
Deal found 7/5![Delta logo]()
$311
This Alaska Airlines deal was found by Cheapflights users on 7/2. 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.
Wed 9/307:00 am
MSO
- ONT
1 stop5h 16m
Alaska Airlines
Thu 10/13:14 pm
ONT
- MSO
1 stop6h 47m
Alaska Airlines
Deal found 7/2![Alaska Airlines logo]()
$419
This Delta deal was found by Cheapflights users on 7/3. 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.
Thu 9/246:00 am
BZN
- ONT
1 stop4h 02m
Delta
Sat 9/266:00 am
ONT
- BZN
1 stop5h 03m
Delta
Deal found 7/3![Delta logo]()
$312
This Alaska Airlines deal was found by Cheapflights users on 7/1. 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 9/265:19 pm
GTF
- ONT
1 stop18h 57m
Alaska Airlines
Wed 9/306:02 am
ONT
- GTF
1 stop9h 37m
Alaska Airlines
Deal found 7/1![Alaska Airlines logo]()
$432
This Delta deal was found by Cheapflights users on 7/2. 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 11/57:15 am
HLN
- ONT
1 stop6h 07m
Delta
Mon 11/95:05 pm
ONT
- HLN
1 stop4h 36m
Delta
Deal found 7/2![Delta logo]()
$319
This Alaska Airlines deal was found by Cheapflights users on 7/5. 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.
Fri 8/283:42 pm
BIL
- ONT
1 stop5h 42m
Alaska Airlines
Sat 8/296:05 pm
ONT
- BIL
2 stops16h 26m
Alaska Airlines
Deal found 7/5![Alaska Airlines logo]()
$437
This Delta deal was found by Cheapflights users on 7/6. 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.
Mon 8/35:15 am
FCA
- ONT
1 stop4h 37m
Delta
Sun 8/96:00 am
ONT
- FCA
1 stop4h 09m
Delta
Deal found 7/6![Delta logo]()
$322
This Alaska Airlines deal was found by Cheapflights users on 7/3. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/31:55 pm
MSO
- ONT
1 stop5h 33m
Alaska Airlines
Sat 11/76:00 am
ONT
- MSO
1 stop8h 34m
Alaska Airlines
Deal found 7/3![Alaska Airlines logo]()
$441
This Delta deal was found by Cheapflights users on 7/3. 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.
Tue 8/116:00 am
BZN
- ONT
1 stop3h 52m
Delta
Sat 11/216:00 am
ONT
- BZN
1 stop5h 23m
Delta
Deal found 7/3![Delta logo]()
$327
This Alaska Airlines deal was found by Cheapflights users on 7/3. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/297:15 am
MSO
- ONT
2 stops10h 55m
Alaska Airlines
Sat 9/53:07 pm
ONT
- MSO
1 stop6h 54m
Alaska Airlines
Deal found 7/3![Alaska Airlines logo]()
$468
This United Airlines deal was found by Cheapflights users on 7/2. 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.
Fri 9/255:00 am
COD
- ONT
1 stop8h 46m
United Airlines
Tue 10/135:00 am
ONT
- COD
1 stop7h 15m
United Airlines
Deal found 7/2![United Airlines logo]()
$764
This Delta deal was found by Cheapflights users on 7/5. 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.
Fri 9/45:40 am
HLN
- ONT
1 stop4h 12m
Delta
Mon 9/76:00 am
ONT
- HLN
1 stop5h 15m
Delta
Deal found 7/5![Delta logo]()
$338
This Alaska Airlines deal was found by Cheapflights users on 7/5. 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.
Sat 12/54:08 pm
HLN
- ONT
1 stop7h 31m
Alaska Airlines
Wed 12/94:00 pm
ONT
- HLN
1 stop22h 31m
Alaska Airlines
Deal found 7/5![Alaska Airlines logo]()
$471
This Delta deal was found by Cheapflights users on 7/2. 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 8/205:15 am
FCA
- ONT
1 stop4h 37m
Delta
Sun 8/236:00 am
ONT
- FCA
1 stop4h 09m
Delta
Deal found 7/2![Delta logo]()
$341
This Alaska Airlines deal was found by Cheapflights users on 7/4. 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.
Sun 7/266:00 am
BIL
- ONT
1 stop6h 11m
Alaska Airlines
Thu 7/305:26 pm
ONT
- BIL
1 stop5h 25m
Alaska Airlines
Deal found 7/4![Alaska Airlines logo]()
$489
This Delta deal was found by Cheapflights users on 7/5. 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.
Fri 8/286:09 pm
FCA
- ONT
1 stop6h 25m
Delta
Sun 9/66:00 am
ONT
- FCA
1 stop4h 09m
Delta
Deal found 7/5![Delta logo]()
$348
This Delta deal was found by Cheapflights users on 7/2. 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 7/305:20 am
BIL
- ONT
1 stop4h 27m
Delta
Fri 7/315:10 pm
ONT
- BIL
1 stop4h 40m
Delta
Deal found 7/2![Delta logo]()
$361
This Alaska Airlines deal was found by Cheapflights users on 7/5. 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.
Thu 8/208:01 pm
FCA
- ONT
1 stop16h 03m
Alaska Airlines
Sun 8/234:27 pm
ONT
- FCA
2 stops19h 01m
Alaska Airlines
Deal found 7/5![Alaska Airlines logo]()
$553
This Alaska Airlines deal was found by Cheapflights users on 7/6. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/208:01 pm
FCA
- ONT
1 stop16h 03m
Alaska Airlines
Mon 8/244:27 pm
ONT
- FCA
2 stops19h 01m
Alaska Airlines
Deal found 7/6![Alaska Airlines logo]()
$553
This Delta deal was found by Cheapflights users on 7/3. 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.
Tue 8/45:15 am
FCA
- ONT
1 stop4h 37m
Delta
Tue 8/116:00 am
ONT
- FCA
1 stop4h 09m
Delta
Deal found 7/3![Delta logo]()
$378
This Delta deal was found by Cheapflights users on 7/2. 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.
Fri 7/315:20 am
BIL
- ONT
1 stop4h 27m
Delta
Sat 8/15:10 pm
ONT
- BIL
1 stop4h 43m
Delta
Deal found 7/2![Delta logo]()
$409
Last-minute flights from Montana to OntarioDiscover last-minute flight deals from Montana to Ontario. Data last updated July 6, 2026 and is based on user searches.
Discover last-minute flight deals from Montana to Ontario. Data last updated July 6, 2026 and is based on user searches.
This Alaska Airlines deal was found by Cheapflights users on 7/6. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/76:03 am
BZN
- ONT
1 stop6h 11m
Alaska Airlines
Tue 8/116:02 am
ONT
- BZN
1 stop7h 07m
Alaska Airlines
Deal found 7/6![Alaska Airlines logo]()
$325
This Alaska Airlines deal was found by Cheapflights users on 7/6. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/76:03 am
BZN
- ONT
1 stop6h 11m
Alaska Airlines
Fri 8/72:05 pm
ONT
- BZN
1 stop8h 14m
Alaska Airlines
Deal found 7/6![Alaska Airlines logo]()
$333
This Alaska Airlines deal was found by Cheapflights users on 7/6. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/76:03 am
BZN
- ONT
1 stop6h 11m
Alaska Airlines
Sun 8/92:05 pm
ONT
- BZN
1 stop8h 14m
Alaska Airlines
Deal found 7/6![Alaska Airlines logo]()
$339
This Delta deal was found by Cheapflights users on 7/5. 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 8/115:20 am
BIL
- ONT
1 stop4h 32m
Delta
Thu 8/135:05 pm
ONT
- BIL
1 stop4h 20m
Delta
Deal found 7/5![Delta logo]()
$311
This Delta deal was found by Cheapflights users on 7/3. 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.
Tue 8/116:00 am
BZN
- ONT
1 stop3h 52m
Delta
Wed 11/255:05 pm
ONT
- BZN
1 stop6h 05m
Delta
Deal found 7/3![Delta logo]()
$327
This Delta deal was found by Cheapflights users on 7/3. 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 8/126:00 am
BZN
- ONT
1 stop3h 52m
Delta
Sun 11/225:05 pm
ONT
- BZN
1 stop6h 05m
Delta
Deal found 7/3![Delta logo]()
$311
This United Airlines deal was found by Cheapflights users on 7/6. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/134:17 pm
FCA
- ONT
1 stop7h 42m
United Airlines
Tue 8/189:01 am
ONT
- FCA
1 stop5h 20m
United Airlines
Deal found 7/6![United Airlines logo]()
$277
This Delta deal was found by Cheapflights users on 7/6. 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.
Thu 8/205:15 am
FCA
- ONT
1 stop4h 37m
Delta
Mon 8/246:00 am
ONT
- FCA
1 stop4h 09m
Delta
Deal found 7/6![Delta logo]()
$322
This Southwest deal was found by Cheapflights users on 7/5. 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.
Thu 8/203:30 pm
BZN
- ONT
1 stop7h 40m
Southwest
Sat 8/2210:35 am
ONT
- BZN
2 stops8h 30m
Southwest
Deal found 7/5![Southwest logo]()
$330
This Delta deal was found by Cheapflights users on 7/2. 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 8/205:15 am
FCA
- ONT
1 stop4h 37m
Delta
Sun 8/236:00 am
ONT
- FCA
1 stop4h 09m
Delta
Deal found 7/2![Delta logo]()
$341
This Delta deal was found by Cheapflights users on 7/6. 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.
Thu 8/275:15 am
FCA
- ONT
1 stop4h 37m
Delta
Mon 8/316:00 am
ONT
- FCA
1 stop4h 09m
Delta
Deal found 7/6![Delta logo]()
$296
This Southwest deal was found by Cheapflights users on 7/3. 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.
Thu 8/271:35 pm
BZN
- ONT
2 stops6h 50m
Southwest
Sun 8/302:05 pm
ONT
- BZN
1 stop7h 35m
Southwest
Deal found 7/3![Southwest logo]()
$344
One-way flights from Montana to OntarioSearch for one-way flight options from Montana to Ontario. Find affordable one-way fares based on user searches. Data last updated July 6, 2026.
Search for one-way flight options from Montana to Ontario. Find affordable one-way fares based on user searches. Data last updated July 6, 2026.
This Delta deal was found by Cheapflights users on 7/3. 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.
Sun 9/205:30 am
FCA
- ONT
1 stop4h 32m
Delta
Deal found 7/3![Delta logo]()
$139
This Booking.com deal was found by Cheapflights users on 7/3. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/298:21 pm
FCA
- ONT
1 stop15h 55m
Alaska Airlines
Deal found 7/3![Alaska Airlines logo]()
$144
This Priceline deal was found by Cheapflights users on 7/2. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/56:03 am
BZN
- ONT
1 stop6h 11m
Alaska Airlines
Deal found 7/2![Alaska Airlines logo]()
$156
This Delta deal was found by Cheapflights users on 7/3. 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.
Thu 9/246:33 pm
BIL
- ONT
1 stop6h 14m
Delta
Deal found 7/3![Delta logo]()
$156
This American Airlines deal was found by Cheapflights users on 7/2. 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.
Sat 8/221:35 pm
BZN
- ONT
1 stop5h 40m
American Airlines
Deal found 7/2![American Airlines logo]()
$157
This Delta deal was found by Cheapflights users on 7/2. 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 7/305:40 am
HLN
- ONT
1 stop4h 07m
Delta
Deal found 7/2![Delta logo]()
$160
This Booking.com deal was found by Cheapflights users on 7/1. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/97:25 pm
BZN
- ONT
1 stop15h 56m
Alaska Airlines
Deal found 7/1![Alaska Airlines logo]()
$161
This Priceline deal was found by Cheapflights users on 7/2. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/66:03 am
BZN
- ONT
1 stop8h 06m
Alaska Airlines
Deal found 7/2![Alaska Airlines logo]()
$170
This Booking.com deal was found by Cheapflights users on 7/2. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/254:15 pm
FCA
- ONT
1 stop8h 44m
Alaska Airlines
Deal found 7/2![Alaska Airlines logo]()
$175
This Booking.com deal was found by Cheapflights users on 7/1. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/53:35 pm
BZN
- ONT
1 stop9h 18m
Alaska Airlines
Deal found 7/1![Alaska Airlines logo]()
$175
This United Airlines deal was found by Cheapflights users on 7/3. 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 8/127:15 am
FCA
- ONT
1 stop5h 57m
United Airlines
Deal found 7/3![United Airlines logo]()
$179
This CheapOair deal was found by Cheapflights users on 7/4. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/176:00 am
BIL
- ONT
1 stop6h 14m
Alaska Airlines
Deal found 7/4![Alaska Airlines logo]()
$181
Find flight deals from Montana to Ontario
Keep the following information in mind while searching for Montana to Ontario flight deals. Data was last updated July 6, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $277 (Delta) |
One-way from | $139 (Delta) |
Popular in | June |
Cheapest in | January |
Average price | $369 |
Cheapflights Fare Finder
Customize your flight search to find flights from Montana to Ontario 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 July 6, 2026.
Use the filters below to find and compare flights from Montana to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
KalispellOntario
FCA - ONT
FCAONT
Kalispell Glacier Park
Thu 8/27
5:15 am-8:52 am
1 stop4h 37m
Ontario
Mon 8/31
6:00 am-11:09 am
1 stop4h 09m
$296
BozemanOntario
BZN - ONT
BZNONT
Bozeman Gallatin Field
Tue 9/29
7:03 am-2:16 pm
1 stop8h 13m
Ontario
Wed 9/30
3:14 pm-10:59 pm
1 stop6h 45m
$311
BozemanOntario
BZN - ONT
BZNONT
Bozeman Gallatin Field
Fri 10/9
5:40 am-8:55 am
1 stop4h 15m
Ontario
Sun 10/11
9:45 am-5:58 pm
1 stop7h 13m
$311
BozemanOntario
BZN - ONT
BZNONT
Bozeman Gallatin Field
Thu 8/27
7:39 pm-11:34 pm
1 stop4h 55m
Ontario
Sun 8/30
6:00 am-12:05 pm
1 stop5h 05m
$311
BozemanOntario
BZN - ONT
BZNONT
Bozeman Gallatin Field
Fri 10/23
5:40 am-8:55 am
1 stop4h 15m
Ontario
Sun 11/1
6:00 am-12:05 pm
1 stop5h 05m
$311
BozemanOntario
BZN - ONT
BZNONT
Bozeman Gallatin Field
Wed 8/12
6:00 am-8:52 am
1 stop3h 52m
Ontario
Wed 11/25
5:05 pm-12:10 am
1 stop6h 05m
$311
BozemanOntario
BZN - ONT
BZNONT
Bozeman Gallatin Field
Fri 9/4
7:39 pm-11:34 pm
1 stop4h 55m
Ontario
Mon 9/7
1:06 pm-6:45 pm
1 stop4h 39m
$311
BozemanOntario
BZN - ONT
BZNONT
Bozeman Gallatin Field
Thu 9/24
6:00 am-9:02 am
1 stop4h 02m
Ontario
Sat 9/26
6:00 am-12:03 pm
1 stop5h 03m
$312
HelenaOntario
HLN - ONT
HLNONT
Helena
Thu 11/5
7:15 am-12:22 pm
1 stop6h 07m
Ontario
Mon 11/9
5:05 pm-10:41 pm
1 stop4h 36m
$319
KalispellOntario
FCA - ONT
FCAONT
Kalispell Glacier Park
Mon 8/3
5:15 am-8:52 am
1 stop4h 37m
Ontario
Sun 8/9
6:00 am-11:09 am
1 stop4h 09m
$322
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Montana to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from Montana with our price prediction graph.
FCA-ONT
BIL-ONT
GTF-ONT
BZN-ONT
MSO-ONT
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 Ontario
USMT-ONT
FCA-ONT
BIL-ONT
GTF-ONT
BZN-ONT
What is the cheapest month to book a flight from Montana to Ontario?
Currently, April is the cheapest month in which you can book a flight from Montana to Ontario (average of $108). Flying from Montana to Ontario in October is currently the most expensive (average of $264). 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.
Related info for your journey
Find useful and relevant information for your journey from Montana to Ontario. 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
Ontario flight routes
Other flight options
Popular flights
Top destinations
Alternative routes for Montana to Ontario
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Ontario by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Montana to Ontario by cabin class
Find flights from Montana to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to Ontario
Explore flights to Ontario departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on July 6, 2026.
Montana and Ontario flights
Browse other Montana and Ontario flight options. Last updated on July 6, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Montana to Ontario flights
Consider these flights traveling from Montana to Ontario.
Top 4 airlines flying from Montana to Ontario
Discover the top 4 airlines that operate flights from Montana to Ontario. 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 July 6, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$108 | Average$354 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$163 | Average$358 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$164 | Average$321 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$223 | Average$350 | FlexibilityNo cancel fee | On-time63% |