$113+ 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 9/27. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — ONT
Sep 22 — Sep 291
Round-trip
1 adult, Economy
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Find cheap flights from Montana to Ontario 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
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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 August 23, 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 August 23, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/179:42 pm -
1 stop10h 22m
Thu 9/242:30 pm -
1 stop5h 22m
Deal found 8/20![Multiple Airlines logo]()
$274
This Kiwi.com deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/118:43 pm -
1 stop13h 26m
Sun 9/138:24 pm -
1 stop22h 32m
Deal found 8/19![Multiple Airlines logo]()
$300
This Delta deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/185:30 am -
1 stop4h 32m
Sun 9/276:00 am -
1 stop4h 47m
Deal found 8/18![Delta logo]()
$307
This Delta deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” 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 12/2112:59 pm -
1 stop4h 11m
Wed 12/306:00 am -
1 stop5h 19m
Deal found 8/22![Delta logo]()
$321
This Booking.com deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/104:59 pm -
1 stop19h 19m
Thu 11/124:09 pm -
1 stop23h 10m
Deal found 8/18![Alaska Airlines logo]()
$326
This Delta deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/107:00 am -
1 stop6h 10m
Tue 11/105:11 pm -
1 stop4h 15m
Deal found 8/18![Delta logo]()
$329
This Alaska Airlines deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/318:01 am -
1 stop6h 15m
Mon 11/26:00 am -
1 stop5h 15m
Deal found 8/20![Alaska Airlines logo]()
$334
This Delta deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/101:04 pm -
2 stops10h 56m
Wed 11/116:00 am -
1 stop5h 22m
Deal found 8/18![Delta logo]()
$334
This Delta deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” 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 9/1212:57 pm -
2 stops10h 43m
Sat 9/195:15 pm -
1 stop4h 14m
Deal found 8/22![Delta logo]()
$335
This Alaska Airlines deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/103:54 pm -
1 stop6h 55m
Wed 11/117:15 am -
1 stop4h 55m
Deal found 8/18![Alaska Airlines logo]()
$339
This Alaska Airlines deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/302:55 pm -
1 stop4h 10m
Tue 11/37:15 am -
1 stop4h 55m
Deal found 8/18![Alaska Airlines logo]()
$340
This Delta deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/101:13 pm -
1 stop4h 17m
Sat 11/147:04 am -
2 stops9h 37m
Deal found 8/18![Delta logo]()
$340
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 August 23, 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 August 23, 2026.
This Delta deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/185:30 am -
1 stop4h 32m
Sun 9/276:00 am -
1 stop4h 47m
Deal found 8/19![Delta logo]()
$307
This Alaska Airlines deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/237:45 pm -
1 stop4h 57m
Tue 10/272:13 pm -
1 stop7h 46m
Deal found 8/19![Alaska Airlines logo]()
$307
This United Airlines deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/44:17 pm -
1 stop7h 42m
Tue 9/89:01 am -
1 stop5h 20m
Deal found 8/20![United Airlines logo]()
$344
This Southwest deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/103:30 pm -
2 stops7h 20m
Mon 9/145:45 pm -
1 stop5h 00m
Deal found 8/19![Southwest logo]()
$384
This Delta deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/107:00 am -
1 stop6h 10m
Sat 11/146:00 am -
1 stop5h 22m
Deal found 8/18![Delta logo]()
$329
This Alaska Airlines deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/318:01 am -
1 stop6h 15m
Mon 11/26:00 am -
1 stop5h 15m
Deal found 8/20![Alaska Airlines logo]()
$334
This Delta deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/107:00 am -
1 stop6h 10m
Tue 11/105:11 pm -
1 stop4h 15m
Deal found 8/18![Delta logo]()
$329
This United Airlines deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/26:15 am -
1 stop7h 35m
Sun 9/65:00 am -
1 stop7h 29m
Deal found 8/19![United Airlines logo]()
$368
This Alaska Airlines deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/103:54 pm -
1 stop6h 55m
Wed 11/117:15 am -
1 stop4h 55m
Deal found 8/18![Alaska Airlines logo]()
$339
This Delta deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/186:20 pm -
1 stop6h 28m
Sun 1/246:00 am -
1 stop5h 27m
Deal found 8/21![Delta logo]()
$332
This Alaska Airlines deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/302:55 pm -
1 stop4h 10m
Tue 11/37:15 am -
1 stop4h 55m
Deal found 8/19![Alaska Airlines logo]()
$340
This United Airlines deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/142:45 pm -
1 stop7h 06m
Tue 11/171:29 pm -
1 stop7h 09m
Deal found 8/22![United Airlines logo]()
$398
This Delta deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/196:20 pm -
1 stop6h 28m
Sun 1/246:00 am -
1 stop5h 27m
Deal found 8/21![Delta logo]()
$332
This Alaska Airlines deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” 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 9/97:03 am -
1 stop8h 13m
Wed 9/237:12 am -
1 stop5h 12m
Deal found 8/22![Alaska Airlines logo]()
$340
This United Airlines deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/122:26 pm -
1 stop7h 27m
Sat 9/195:00 am -
1 stop7h 45m
Deal found 8/22![United Airlines logo]()
$409
This Delta deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/106:23 pm -
1 stop6h 35m
Sat 11/146:00 am -
1 stop5h 05m
Deal found 8/18![Delta logo]()
$339
This Alaska Airlines deal was found by Cheapflights users on 8/23. 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.
Thu 10/227:32 pm -
1 stop15h 45m
Sat 10/242:13 pm -
1 stop8h 37m
Deal found 8/23![Alaska Airlines logo]()
$369
This United Airlines deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/316:28 am -
1 stop7h 05m
Wed 11/45:00 am -
1 stop7h 40m
Deal found 8/19![United Airlines logo]()
$409
This Delta deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/101:00 pm -
1 stop4h 30m
Fri 11/135:11 pm -
1 stop5h 58m
Deal found 8/18![Delta logo]()
$340
This United Airlines deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/146:28 am -
1 stop7h 05m
Tue 11/171:29 pm -
1 stop7h 02m
Deal found 8/22![United Airlines logo]()
$409
This Alaska Airlines deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/123:54 pm -
1 stop6h 55m
Sat 11/1410:40 am -
2 stops27h 34m
Deal found 8/17![Alaska Airlines logo]()
$376
This Delta deal was found by Cheapflights users on 8/23. 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 12/16:16 pm -
1 stop6h 42m
Fri 12/46:00 am -
1 stop4h 38m
Deal found 8/23![Delta logo]()
$359
This Alaska Airlines deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/56:00 am -
1 stop6h 09m
Wed 12/96:00 am -
1 stop8h 08m
Deal found 8/20![Alaska Airlines logo]()
$379
This United Airlines deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/102:29 pm -
1 stop7h 24m
Wed 9/161:18 pm -
1 stop6h 42m
Deal found 8/20![United Airlines logo]()
$428
This Delta deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/51:08 pm -
2 stops10h 35m
Mon 11/95:11 pm -
1 stop4h 15m
Deal found 8/21![Delta logo]()
$359
This Alaska Airlines deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/267:41 am -
1 stop6h 35m
Fri 10/3011:13 am -
1 stop6h 39m
Deal found 8/19![Alaska Airlines logo]()
$387
This United Airlines deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/142:01 pm -
1 stop7h 50m
Wed 11/189:25 am -
2 stops11h 49m
Deal found 8/20![United Airlines logo]()
$439
This Delta deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” 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 9/176:00 am -
1 stop4h 02m
Sun 9/206:00 am -
1 stop5h 03m
Deal found 8/22![Delta logo]()
$370
This Alaska Airlines deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/184:08 pm -
1 stop7h 33m
Sat 1/237:10 am -
2 stops7h 18m
Deal found 8/21![Alaska Airlines logo]()
$393
This United Airlines deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/312:01 pm -
1 stop7h 50m
Tue 11/39:25 am -
2 stops11h 49m
Deal found 8/21![United Airlines logo]()
$439
Last-minute flights from Montana to OntarioDiscover last-minute flight deals from Montana to Ontario. Data last updated August 23, 2026 and is based on user searches.
Discover last-minute flight deals from Montana to Ontario. Data last updated August 23, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/44:17 pm -
1 stop7h 42m
Tue 9/89:01 am -
1 stop5h 20m
Deal found 8/20![United Airlines logo]()
$344
This Alaska Airlines deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” 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 9/97:03 am -
1 stop8h 13m
Wed 9/237:12 am -
1 stop5h 12m
Deal found 8/22![Alaska Airlines logo]()
$340
This Alaska Airlines deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/107:03 am -
1 stop8h 13m
Sat 9/193:14 pm -
1 stop6h 45m
Deal found 8/19![Alaska Airlines logo]()
$339
This Kiwi.com deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/118:43 pm -
1 stop13h 26m
Sun 9/138:24 pm -
1 stop22h 32m
Deal found 8/19![Multiple Airlines logo]()
$300
This Delta deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” 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 9/117:15 am -
1 stop5h 59m
Mon 9/146:00 am -
1 stop5h 17m
Deal found 8/22![Delta logo]()
$354
This Delta deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” 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 9/1212:57 pm -
2 stops10h 43m
Sat 9/195:15 pm -
1 stop4h 14m
Deal found 8/22![Delta logo]()
$335
This Kiwi.com deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/179:42 pm -
1 stop10h 22m
Thu 9/242:30 pm -
1 stop5h 22m
Deal found 8/20![Multiple Airlines logo]()
$274
This Delta deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/185:30 am -
1 stop4h 32m
Sun 9/276:00 am -
1 stop4h 47m
Deal found 8/18![Delta logo]()
$307
This Delta deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/297:15 am -
1 stop5h 59m
Thu 10/16:00 am -
1 stop5h 17m
Deal found 8/20![Delta logo]()
$329
This Delta deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2912:57 pm -
2 stops10h 43m
Sat 10/35:15 pm -
1 stop4h 14m
Deal found 8/20![Delta logo]()
$334
This Delta deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/296:00 am -
1 stop4h 02m
Fri 10/25:15 pm -
1 stop6h 04m
Deal found 8/20![Delta logo]()
$354
This Delta deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2912:57 pm -
2 stops10h 43m
Mon 10/56:00 am -
1 stop5h 17m
Deal found 8/20![Delta logo]()
$359
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 August 23, 2026.
Search for one-way flight options from Montana to Ontario. Find affordable one-way fares based on user searches. Data last updated August 23, 2026.
This Trip.com deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/279:42 pm -
1 stop10h 22m
Deal found 8/18![Multiple Airlines logo]()
$113
This Kiwi.com deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/118:43 pm -
1 stop13h 26m
Deal found 8/19![Multiple Airlines logo]()
$114
This Trip.com deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/412:01 pm -
1 stop24h 21m
Deal found 8/20![Multiple Airlines logo]()
$119
This Kiwi.com deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/148:46 pm -
1 stop13h 23m
Deal found 8/20![Multiple Airlines logo]()
$120
This Trip.com deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/209:42 pm -
1 stop14h 40m
Deal found 8/18![Multiple Airlines logo]()
$133
This Trip.com deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/249:42 pm -
1 stop14h 40m
Deal found 8/20![Multiple Airlines logo]()
$136
This Delta deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/155:30 am -
1 stop4h 32m
Deal found 8/20![Delta logo]()
$154
This Trip.com deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/179:42 pm -
1 stop10h 22m
Deal found 8/17![Multiple Airlines logo]()
$154
This Delta deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/245:20 am -
1 stop4h 42m
Deal found 8/18![Delta logo]()
$161
This Trip.com deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/19:56 am -
1 stop7h 53m
Deal found 8/17![Multiple Airlines logo]()
$164
This United Airlines deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/106:20 am -
1 stop7h 30m
Deal found 8/18![United Airlines logo]()
$165
This Booking.com deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/97:29 pm -
1 stop16h 47m
Deal found 8/20![Alaska Airlines logo]()
$166
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 August 23, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $274 (Kiwi.com) |
One-way from | $113 (Trip.com) |
Popular in | July |
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 7,457,451 searches. Data last updated August 23, 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
KalispellOntario
FCA Kalispell Glacier Park - ONT Ontario
FCAONT
Kalispell Glacier Park
Fri 9/18
5:30 am-9:02 am
1 stop4h 32m
Ontario
Sun 9/27
6:00 am-11:47 am
1 stop4h 47m
$307
KalispellOntario
FCA Kalispell Glacier Park - ONT Ontario
FCAONT
Kalispell Glacier Park
Fri 10/23
7:45 pm-11:42 pm
1 stop4h 57m
Ontario
Tue 10/27
2:13 pm-10:59 pm
1 stop7h 46m
$307
HelenaOntario
HLN Helena - ONT Ontario
HLNONT
Helena
Tue 11/10
7:00 am-12:10 pm
1 stop6h 10m
Ontario
Sat 11/14
6:00 am-12:22 pm
1 stop5h 22m
$329
HelenaOntario
HLN Helena - ONT Ontario
HLNONT
Helena
Tue 11/10
7:00 am-12:10 pm
1 stop6h 10m
Ontario
Tue 11/10
5:11 pm-10:26 pm
1 stop4h 15m
$329
Great FallsOntario
GTF Great Falls - ONT Ontario
GTFONT
Great Falls
Mon 1/18
6:20 pm-11:48 pm
1 stop6h 28m
Ontario
Sun 1/24
6:00 am-12:27 pm
1 stop5h 27m
$332
Great FallsOntario
GTF Great Falls - ONT Ontario
GTFONT
Great Falls
Tue 1/19
6:20 pm-11:48 pm
1 stop6h 28m
Ontario
Sun 1/24
6:00 am-12:27 pm
1 stop5h 27m
$332
KalispellOntario
FCA Kalispell Glacier Park - ONT Ontario
FCAONT
Kalispell Glacier Park
Sat 10/31
8:01 am-1:16 pm
1 stop6h 15m
Ontario
Mon 11/2
6:00 am-12:15 pm
1 stop5h 15m
$334
BozemanOntario
BZN Bozeman Gallatin Field - ONT Ontario
BZNONT
Bozeman Gallatin Field
Tue 11/10
3:54 pm-9:49 pm
1 stop6h 55m
Ontario
Wed 11/11
7:15 am-1:10 pm
1 stop4h 55m
$339
BozemanOntario
BZN Bozeman Gallatin Field - ONT Ontario
BZNONT
Bozeman Gallatin Field
Tue 11/10
6:23 pm-11:58 pm
1 stop6h 35m
Ontario
Sat 11/14
6:00 am-12:05 pm
1 stop5h 05m
$339
Quickest round-trip
BozemanOntario
BZN Bozeman Gallatin Field - ONT Ontario
BZNONT
Bozeman Gallatin Field
Fri 10/30
2:55 pm-6:05 pm
1 stop4h 10m
Ontario
Tue 11/3
7:15 am-1:10 pm
1 stop4h 55m
$340
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.
BZN-ONT
FCA-ONT
HLN-ONT
GTF-ONT
BIL-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
BZN-ONT
FCA-ONT
HLN-ONT
GTF-ONT
What is the cheapest month to book a flight from Montana to Ontario?
Currently, June is the cheapest month in which you can book a flight from Montana to Ontario (average of $260). Flying from Montana to Ontario in July is currently the most expensive (average of $427). 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 Ontario?
Airfare is below average for this route at the moment.
Montana to Ontario flights typically cost between $292 and $348 in September.The cheapest round-trip price found within the last 5 days was $274 on Multiple Airlines (Sep 17-Sep 24).
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
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Ontario flight routes
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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 August 23, 2026.
Montana and Ontario flights
Browse other Montana and Ontario flight options. Last updated on August 23, 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 3 airlines flying from Montana to Ontario
Discover the top 3 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 7,457,451 searches. Data last updated August 23, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$108 | Average$367 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$163 | Average$362 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$164 | Average$330 | FlexibilityNo cancel fee | On-time69% |