$126+ Cheap flights from Massachusetts to Ontario (ONT)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/28. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — ONT
Oct 17 — Oct 241
Round-trip
1 adult, Economy
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Find cheap flights from Massachusetts to Ontario with Cheapflights
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Cheapest flights from Massachusetts to OntarioExplore the most affordable flight options available from Massachusetts to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2026.
Explore the most affordable flight options available from Massachusetts to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2026.
This Southwest deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” 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 11/105:00 am -
1 stop8h 10m
Tue 11/176:50 am -
1 stop7h 00m
Deal found 9/16![Southwest logo]()
$251
This Southwest deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” 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 10/245:15 am -
1 stop8h 05m
Sat 10/316:30 am -
1 stop9h 55m
Deal found 9/14![Southwest logo]()
$252
This Mytrip deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/107:13 am -
1 stop11h 00m
Wed 11/186:00 am -
1 stop14h 58m
Deal found 9/15![Alaska Airlines logo]()
$260
This Mytrip deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/216:40 pm -
1 stop18h 37m
Sat 10/2411:13 am -
1 stop9h 46m
Deal found 9/14![Alaska Airlines logo]()
$261
This Mytrip deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/276:40 pm -
1 stop18h 37m
Tue 11/36:00 am -
1 stop14h 58m
Deal found 9/16![Alaska Airlines logo]()
$262
This Mytrip deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/316:37 pm -
1 stop20h 29m
Tue 11/36:00 am -
1 stop14h 58m
Deal found 9/16![Alaska Airlines logo]()
$263
This Gotogate deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/216:40 pm -
1 stop18h 37m
Wed 10/287:25 am -
1 stop19h 47m
Deal found 9/16![Alaska Airlines logo]()
$265
This American Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” 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 10/105:21 pm -
1 stop8h 38m
Tue 10/2011:59 pm -
1 stop9h 03m
Deal found 9/16![American Airlines logo]()
$267
This Alaska Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” 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 10/294:58 pm -
1 stop9h 44m
Sat 10/3111:13 am -
1 stop9h 46m
Deal found 9/16![Alaska Airlines logo]()
$268
This American Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/106:18 am -
1 stop10h 14m
Tue 11/179:50 am -
2 stops11h 34m
Deal found 9/16![American Airlines logo]()
$296
This Delta deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” 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 11/106:00 am -
1 stop8h 08m
Tue 11/1712:18 pm -
1 stop8h 41m
Deal found 9/16![Delta logo]()
$297
This Delta deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” 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 11/186:00 am -
1 stop8h 08m
Thu 11/2612:18 pm -
1 stop8h 41m
Deal found 9/14![Delta logo]()
$300
Best flights from Massachusetts to OntarioDiscover carefully curated flight deals from Massachusetts to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 17, 2026.
Discover carefully curated flight deals from Massachusetts to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 17, 2026.
This Southwest deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” 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 11/55:00 am -
1 stop12h 05m
Mon 11/98:45 pm -
2 stops10h 00m
Deal found 9/15![Southwest logo]()
$296
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/89:45 am -
1 stop10h 51m
Wed 12/166:00 am -
1 stop7h 55m
Deal found 9/16![United Airlines logo]()
$361
This Delta deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” 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 12/32:56 pm -
1 stop10h 00m
Sun 12/65:04 pm -
1 stop10h 16m
Deal found 9/13![Delta logo]()
$387
This Southwest deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” 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 11/205:55 am -
2 stops11h 10m
Sat 12/58:20 am -
1 stop7h 20m
Deal found 9/13![Southwest logo]()
$372
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/65:03 pm -
1 stop8h 46m
Tue 10/271:29 pm -
1 stop7h 15m
Deal found 9/16![United Airlines logo]()
$377
This Delta deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” 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 10/236:05 am -
1 stop9h 31m
Sat 11/76:00 am -
1 stop7h 38m
Deal found 9/12![Delta logo]()
$387
This Southwest deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” 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 10/265:50 am -
1 stop11h 20m
Thu 10/292:50 pm -
1 stop7h 25m
Deal found 9/15![Southwest logo]()
$412
This United Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” 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 10/243:35 pm -
1 stop8h 23m
Fri 10/301:32 pm -
1 stop7h 12m
Deal found 9/14![United Airlines logo]()
$413
This Delta deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” 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 11/36:10 am -
1 stop7h 56m
Tue 11/1012:18 pm -
1 stop8h 35m
Deal found 9/12![Delta logo]()
$427
This KAYAK deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/216:45 am -
2 stops14h 15m
Mon 10/266:56 pm -
2 stops15h 15m
Deal found 9/12![Multiple Airlines logo]()
$962
This Southwest deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” 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 2/137:20 am -
1 stop8h 05m
Sun 2/215:25 am -
1 stop7h 50m
Deal found 9/15![Southwest logo]()
$439
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” 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.
Mon 12/1411:35 am -
1 stop10h 14m
Sun 12/2711:52 pm -
1 stop7h 25m
Deal found 9/15![United Airlines logo]()
$446
This Delta deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” 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 12/156:45 pm -
1 stop8h 13m
Mon 12/2810:29 pm -
1 stop9h 19m
Deal found 9/16![Delta logo]()
$453
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” 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 11/61:51 pm -
1 stop11h 57m
Wed 11/119:25 am -
2 stops11h 34m
Deal found 9/15![United Airlines logo]()
$465
This Southwest deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” 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 2/132:25 pm -
2 stops9h 45m
Fri 2/197:30 pm -
2 stops9h 40m
Deal found 9/16![Southwest logo]()
$466
This Delta deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” 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 10/76:05 am -
1 stop9h 31m
Sun 10/116:20 am -
1 stop10h 21m
Deal found 9/12![Delta logo]()
$493
This Southwest deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” 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 11/58:35 am -
1 stop10h 10m
Sun 11/811:55 pm -
1 stop8h 15m
Deal found 9/13![Southwest logo]()
$467
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” 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 11/611:55 am -
2 stops13h 53m
Mon 11/99:25 am -
1 stop10h 56m
Deal found 9/16![United Airlines logo]()
$482
This Delta deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” 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 10/76:05 am -
1 stop9h 31m
Tue 10/136:00 pm -
1 stop10h 35m
Deal found 9/12![Delta logo]()
$493
This Southwest deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” 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 2/132:25 pm -
2 stops9h 45m
Sat 2/206:20 am -
1 stop6h 35m
Deal found 9/15![Southwest logo]()
$485
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” 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 2/139:30 am -
2 stops11h 17m
Sat 2/206:53 pm -
2 stops11h 54m
Deal found 9/15![United Airlines logo]()
$542
This Southwest deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” 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 12/224:30 pm -
1 stop8h 25m
Mon 1/412:10 pm -
2 stops9h 50m
Deal found 9/15![Southwest logo]()
$502
This Delta deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” 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 10/25:00 pm -
2 stops9h 47m
Sat 10/312:17 pm -
1 stop8h 40m
Deal found 9/14![Delta logo]()
$612
This United Airlines deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” 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 2/310:20 am -
3 stops13h 00m
Sat 2/135:00 am -
2 stops13h 22m
Deal found 9/12![United Airlines logo]()
$557
This Delta deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” 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 12/231:59 pm -
1 stop12h 39m
Wed 12/3010:29 pm -
1 stop8h 55m
Deal found 9/16![Delta logo]()
$627
This United Airlines deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” 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 11/1312:37 pm -
1 stop9h 10m
Mon 11/161:29 pm -
1 stop7h 15m
Deal found 9/13![United Airlines logo]()
$597
This Southwest deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” 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 10/84:25 pm -
1 stop8h 50m
Wed 10/148:25 am -
2 stops9h 40m
Deal found 9/14![Southwest logo]()
$622
This United Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” 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 10/298:40 am -
2 stops14h 35m
Sun 11/11:29 pm -
1 stop7h 01m
Deal found 9/14![United Airlines logo]()
$602
This Delta deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/26:15 am -
1 stop7h 54m
Thu 10/811:15 pm -
2 stops9h 45m
Deal found 9/15![Delta logo]()
$728
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” 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 11/119:37 am -
2 stops11h 24m
Sun 11/155:00 am -
1 stop7h 56m
Deal found 9/16![United Airlines logo]()
$633
Last-minute flights from Massachusetts to OntarioDiscover last-minute flight deals from Massachusetts to Ontario. Data last updated September 17, 2026 and is based on user searches.
Discover last-minute flight deals from Massachusetts to Ontario. Data last updated September 17, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/64:01 pm -
2 stops10h 51m
Tue 10/1311:59 pm -
1 stop9h 03m
Deal found 9/15![American Airlines logo]()
$330
This American Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” 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 10/105:21 pm -
1 stop8h 38m
Tue 10/2011:59 pm -
1 stop9h 03m
Deal found 9/16![American Airlines logo]()
$267
This Mytrip deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/216:40 pm -
1 stop18h 37m
Sat 10/2411:13 am -
1 stop9h 46m
Deal found 9/14![Alaska Airlines logo]()
$261
This Gotogate deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/216:40 pm -
1 stop18h 37m
Wed 10/287:25 am -
1 stop19h 47m
Deal found 9/16![Alaska Airlines logo]()
$265
This Mytrip deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/216:40 pm -
1 stop18h 37m
Mon 10/266:56 pm -
1 stop9h 30m
Deal found 9/16![Alaska Airlines logo]()
$280
This Mytrip deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/226:40 pm -
1 stop18h 37m
Tue 10/272:13 pm -
1 stop14h 13m
Deal found 9/16![Alaska Airlines logo]()
$281
This Delta deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” 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 10/232:00 pm -
1 stop10h 54m
Mon 10/2611:15 pm -
1 stop8h 04m
Deal found 9/16![Delta logo]()
$321
This Southwest deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” 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 10/245:15 am -
1 stop8h 05m
Sat 10/316:30 am -
1 stop9h 55m
Deal found 9/14![Southwest logo]()
$252
This Alaska Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/279:03 am -
1 stop11h 57m
Sat 10/3111:13 am -
1 stop9h 46m
Deal found 9/16![Alaska Airlines logo]()
$251
This Mytrip deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/276:40 pm -
1 stop18h 37m
Tue 11/36:00 am -
1 stop14h 58m
Deal found 9/16![Alaska Airlines logo]()
$262
This Alaska Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” 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 10/294:58 pm -
1 stop9h 44m
Sat 10/3111:13 am -
1 stop9h 46m
Deal found 9/16![Alaska Airlines logo]()
$268
This Mytrip deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/316:37 pm -
1 stop20h 29m
Tue 11/36:00 am -
1 stop14h 58m
Deal found 9/16![Alaska Airlines logo]()
$263
One-way flights from Massachusetts to OntarioSearch for one-way flight options from Massachusetts to Ontario. Find affordable one-way fares based on user searches. Data last updated September 17, 2026.
Search for one-way flight options from Massachusetts to Ontario. Find affordable one-way fares based on user searches. Data last updated September 17, 2026.
This Alaska Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” 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 10/289:03 am -
1 stop11h 57m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Alaska Airlines logo]()
$126
This Southwest deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” 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 11/111:20 pm -
2 stops11h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Southwest logo]()
$131
This Mytrip deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/147:03 pm -
1 stop17h 49m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Alaska Airlines logo]()
$139
This American Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” 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 10/244:14 pm -
1 stop9h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![American Airlines logo]()
$142
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” 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.
Mon 11/98:05 am -
1 stop10h 28m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![United Airlines logo]()
$143
This Mytrip deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/146:40 pm -
1 stop18h 37m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Alaska Airlines logo]()
$144
This Delta deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” 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 10/206:05 am -
1 stop9h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Delta logo]()
$149
This Delta deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” 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 10/276:00 am -
1 stop8h 06m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Delta logo]()
$149
This Delta deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” 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 10/152:00 pm -
1 stop10h 54m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Delta logo]()
$152
This Southwest deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” 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 10/295:50 am -
2 stops11h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![Southwest logo]()
$157
This Delta deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” 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 12/112:56 pm -
1 stop10h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Delta logo]()
$160
This KAYAK deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/97:50 am -
1 stop12h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Delta logo]()
$166
Find flight deals from Massachusetts to Ontario
Keep the following information in mind while searching for Massachusetts to Ontario flight deals. Data was last updated September 17, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $251 (Southwest) |
One-way from | $126 (Alaska Airlines) |
Popular in | April |
Cheapest in | January |
Average price | $331 |
Cheapflights Fare Finder
Customize your flight search to find flights from Massachusetts 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 September 17, 2026.
Use the filters below to find and compare flights from Massachusetts to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
BostonOntario
BOS Boston Logan Intl - ONT Ontario
BOSONT
Boston Logan Intl
Wed 10/21
6:05 am-12:36 pm
1 stop9h 31m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$149
BostonOntario
BOS Boston Logan Intl - ONT Ontario
BOSONT
Boston Logan Intl
Sat 10/24
11:15 am-4:23 pm
1 stop8h 08m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$149
BostonOntario
BOS Boston Logan Intl - ONT Ontario
BOSONT
Boston Logan Intl
Fri 10/16
4:58 pm-11:42 pm
1 stop9h 44m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$160
BostonOntario
BOS Boston Logan Intl - ONT Ontario
BOSONT
Boston Logan Intl
Sat 10/31
8:35 am-8:51 pm
2 stops15h 16m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$186
BostonOntario
BOS Boston Logan Intl - ONT Ontario
BOSONT
Boston Logan Intl
Tue 11/10
7:13 am-3:13 pm
1 stop11h 00m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$194
BostonOntario
BOS Boston Logan Intl - ONT Ontario
BOSONT
Boston Logan Intl
Sat 10/3
5:30 am-11:07 am
1 stop8h 37m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$194
BostonOntario
BOS Boston Logan Intl - ONT Ontario
BOSONT
Boston Logan Intl
Thu 11/26
9:12 am-3:59 pm
1 stop9h 47m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$198
BostonOntario
BOS Boston Logan Intl - ONT Ontario
BOSONT
Boston Logan Intl
Mon 11/9
5:00 am-1:00 pm
2 stops11h 00m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$199
HartfordOntario
BDL Hartford Bradley Intl - ONT Ontario
BDLONT
Hartford Bradley Intl
Sat 10/24
9:44 am-8:58 pm
2 stops14h 14m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$209
HartfordOntario
BDL Hartford Bradley Intl - ONT Ontario
BDLONT
Hartford Bradley Intl
Tue 11/10
6:00 am-11:08 am
1 stop8h 08m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$216
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Massachusetts to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from Massachusetts with our price prediction graph.
BOS-ONT
ALB-ONT
BDL-ONT
PVC-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 Massachusetts to Ontario
USMA-ONT
BOS-ONT
ALB-ONT
BDL-ONT
PVC-ONT
What is the cheapest month to book a flight from Massachusetts to Ontario?
Currently, February is the cheapest month in which you can book a flight from Massachusetts to Ontario (average of $352). Flying from Massachusetts to Ontario in December is currently the most expensive (average of $872). 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 Massachusetts to Ontario?
Airfare is below average for this route at the moment.
Massachusetts to Ontario flights typically cost between $366 and $597 in November.The cheapest round-trip price found within the last 5 days was $251 on Southwest (Nov 10-Nov 17).
How far ahead should I book a flight from Massachusetts to Ontario?
To ensure you get the cheapest price possible for a flight from Massachusetts to Ontario, you should look to book at least 57 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
Related info for your journey
Find useful and relevant information for your journey from Massachusetts 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.
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Complete your trip
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Ontario flight routes
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Popular flights
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Alternative routes for Massachusetts 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 Massachusetts to Ontario by cabin class
Find flights from Massachusetts 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 September 17, 2026.
Massachusetts and Ontario flights
Browse other Massachusetts and Ontario flight options. Last updated on September 17, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Massachusetts to Ontario flights
Consider these flights traveling from Massachusetts to Ontario.
Top 5 airlines flying from Massachusetts to Ontario
Discover the top 5 airlines that operate flights from Massachusetts 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 September 17, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$233 | Average$565 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$239 | Average$487 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$258 | Average$507 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$298 | Average$762 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$317 | Average$510 | FlexibilityNo cancel fee | On-time63% |