$124+ Cheap flights from Massachusetts 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 5/19. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — ONT
Jun 2 — Jun 91
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 May 3, 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 May 3, 2026.
This United Airlines deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” 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 8/214:15 pm
BOS
- ONT
1 stop9h 43m
United Airlines
Sat 8/227:00 am
ONT
- BOS
1 stop9h 19m
United Airlines
Deal found 4/30![United Airlines logo]()
$292
This Trip.com deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” 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.
Sat 5/306:00 am
BOS
- ONT
1 stop11h 55m
Alaska Airlines
Sat 6/65:57 pm
ONT
- BOS
1 stop9h 23m
Alaska Airlines
Deal found 4/30![Alaska Airlines logo]()
$296
This Delta deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/305:45 am
BOS
- ONT
1 stop8h 19m
Delta
Sat 9/127:00 am
ONT
- BOS
1 stop7h 57m
Delta
Deal found 4/28![Delta logo]()
$297
This Delta deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/201:00 pm
ALB
- ONT
1 stop8h 36m
Delta
Wed 5/2712:07 pm
ONT
- ALB
1 stop8h 51m
Delta
Deal found 4/29![Delta logo]()
$297
This American Airlines deal was found by Cheapflights users on 5/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/911:21 am
BOS
- ONT
2 stops10h 00m
American Airlines
Tue 6/1610:00 pm
ONT
- BOS
1 stop10h 11m
American Airlines
Deal found 5/1![American Airlines logo]()
$302
This Alaska Airlines deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/306:00 am
BOS
- ONT
1 stop11h 55m
Alaska Airlines
Tue 6/25:57 pm
ONT
- BOS
1 stop9h 27m
Alaska Airlines
Deal found 4/30![Alaska Airlines logo]()
$309
This Alaska Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/134:48 pm
BOS
- ONT
1 stop10h 10m
Alaska Airlines
Tue 5/195:57 pm
ONT
- BOS
1 stop9h 24m
Alaska Airlines
Deal found 4/29![Alaska Airlines logo]()
$317
This Delta deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” 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 9/112:45 pm
BOS
- ONT
1 stop8h 16m
Delta
Tue 9/157:00 am
ONT
- BOS
1 stop9h 32m
Delta
Deal found 4/30![Delta logo]()
$318
This American Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/297:00 am
BOS
- ONT
1 stop9h 28m
American Airlines
Mon 6/17:12 pm
ONT
- BOS
2 stops10h 29m
American Airlines
Deal found 4/28![American Airlines logo]()
$323
This Trip.com deal was found by Cheapflights users on 5/1. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/247:20 am
BOS
- ONT
1 stop10h 49m
Alaska Airlines
Tue 6/25:57 pm
ONT
- BOS
1 stop9h 27m
Alaska Airlines
Deal found 5/1![Alaska Airlines logo]()
$325
This Kiwi.com deal was found by Cheapflights users on 5/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/235:40 pm
BDL
- ONT
1 stop24h 29m
Multiple Airlines
Tue 8/251:27 pm
ONT
- BDL
1 stop13h 53m
Multiple Airlines
Deal found 5/3![Multiple Airlines logo]()
$325
This American Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/274:46 pm
BOS
- ONT
1 stop8h 50m
American Airlines
Sat 5/3012:41 pm
ONT
- BOS
1 stop8h 23m
American Airlines
Deal found 4/29![American Airlines logo]()
$327
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 May 3, 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 May 3, 2026.
This Delta deal was found by Cheapflights users on 5/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/316:25 pm
BOS
- ONT
1 stop8h 19m
Delta
Thu 9/105:05 pm
ONT
- BOS
1 stop10h 04m
Delta
Deal found 5/1![Delta logo]()
$318
This Alaska Airlines deal was found by Cheapflights users on 5/2. 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 6/37:20 am
BOS
- ONT
1 stop10h 49m
Alaska Airlines
Tue 6/95:57 pm
ONT
- BOS
1 stop9h 23m
Alaska Airlines
Deal found 5/2![Alaska Airlines logo]()
$334
This Southwest deal was found by Cheapflights users on 5/1. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/145:15 am
BOS
- ONT
2 stops10h 05m
Southwest
Sun 10/1811:55 pm
ONT
- BOS
1 stop7h 35m
Southwest
Deal found 5/1![Southwest logo]()
$384
This United Airlines deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” 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 6/106:00 am
BOS
- ONT
1 stop9h 12m
United Airlines
Tue 6/166:30 pm
ONT
- BOS
1 stop8h 28m
United Airlines
Deal found 4/30![United Airlines logo]()
$454
This Delta deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/115:45 am
BOS
- ONT
1 stop8h 19m
Delta
Tue 8/255:05 pm
ONT
- BOS
1 stop10h 04m
Delta
Deal found 4/28![Delta logo]()
$318
This Alaska Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/219:20 am
BOS
- ONT
1 stop11h 53m
Alaska Airlines
Sat 10/2412:00 pm
ONT
- BOS
1 stop9h 05m
Alaska Airlines
Deal found 4/29![Alaska Airlines logo]()
$359
This Delta deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/115:45 am
BOS
- ONT
1 stop8h 19m
Delta
Sat 8/295:05 pm
ONT
- BOS
1 stop10h 04m
Delta
Deal found 4/28![Delta logo]()
$339
This Southwest deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” 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 7/16:00 am
ALB
- ONT
1 stop9h 05m
Southwest
Sun 7/511:55 pm
ONT
- ALB
2 stops9h 20m
Southwest
Deal found 4/30![Southwest logo]()
$443
This Alaska Airlines deal was found by Cheapflights users on 5/1. 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.
Sun 5/247:20 am
BOS
- ONT
1 stop10h 49m
Alaska Airlines
Sat 5/305:57 pm
ONT
- BOS
1 stop9h 23m
Alaska Airlines
Deal found 5/1![Alaska Airlines logo]()
$418
This United Airlines deal was found by Cheapflights users on 5/2. 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.
Tue 9/225:45 am
BOS
- ONT
2 stops15h 26m
United Airlines
Wed 9/237:13 pm
ONT
- BOS
2 stops11h 11m
United Airlines
Deal found 5/2![United Airlines logo]()
$464
This Delta deal was found by Cheapflights users on 5/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/251:59 pm
ALB
- ONT
2 stops10h 57m
Delta
Tue 9/112:00 pm
ONT
- ALB
1 stop8h 38m
Delta
Deal found 5/1![Delta logo]()
$392
This Southwest deal was found by Cheapflights users on 5/1. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/143:55 pm
BDL
- ONT
1 stop8h 45m
Southwest
Sun 10/186:40 pm
ONT
- BDL
2 stops10h 30m
Southwest
Deal found 5/1![Southwest logo]()
$462
This Delta deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/125:45 am
BOS
- ONT
1 stop8h 19m
Delta
Fri 8/2812:00 pm
ONT
- BOS
1 stop8h 56m
Delta
Deal found 4/28![Delta logo]()
$408
This Alaska Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/296:00 am
BOS
- ONT
1 stop31h 21m
Alaska Airlines
Wed 6/35:57 pm
ONT
- BOS
1 stop9h 23m
Alaska Airlines
Deal found 4/28![Alaska Airlines logo]()
$456
This United Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/271:00 pm
ALB
- ONT
2 stops12h 58m
United Airlines
Mon 8/317:00 am
ONT
- ALB
1 stop7h 34m
United Airlines
Deal found 4/29![United Airlines logo]()
$512
This Southwest deal was found by Cheapflights users on 5/2. 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.
Tue 7/71:00 pm
ALB
- ONT
2 stops9h 00m
Southwest
Tue 7/1411:55 pm
ONT
- ALB
1 stop7h 50m
Southwest
Deal found 5/2![Southwest logo]()
$473
This Delta deal was found by Cheapflights users on 5/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/245:30 am
ALB
- ONT
2 stops19h 26m
Delta
Mon 8/3110:59 pm
ONT
- ALB
1 stop10h 01m
Delta
Deal found 5/1![Delta logo]()
$446
This United Airlines deal was found by Cheapflights users on 5/2. 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.
Sat 6/67:45 am
ALB
- ONT
1 stop7h 53m
United Airlines
Tue 6/91:18 pm
ONT
- ALB
1 stop7h 12m
United Airlines
Deal found 5/2![United Airlines logo]()
$547
This Southwest deal was found by Cheapflights users on 5/1. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/169:30 am
ALB
- ONT
2 stops11h 05m
Southwest
Wed 5/207:55 am
ONT
- ALB
1 stop7h 05m
Southwest
Deal found 5/1![Southwest logo]()
$524
This Delta deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/12:07 pm
BDL
- ONT
1 stop10h 41m
Delta
Tue 6/97:05 am
ONT
- BDL
1 stop7h 59m
Delta
Deal found 4/29![Delta logo]()
$449
This United Airlines deal was found by Cheapflights users on 5/2. 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.
Sat 5/234:55 pm
BDL
- ONT
1 stop8h 56m
United Airlines
Wed 5/275:00 am
ONT
- BDL
1 stop15h 44m
United Airlines
Deal found 5/2![United Airlines logo]()
$572
This United Airlines deal was found by Cheapflights users on 5/2. 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.
Thu 8/1312:45 pm
BDL
- ONT
2 stops13h 13m
United Airlines
Mon 8/247:13 pm
ONT
- BDL
2 stops11h 46m
United Airlines
Deal found 5/2![United Airlines logo]()
$577
This Delta deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/206:10 am
BOS
- ONT
1 stop9h 09m
Delta
Sat 5/305:55 pm
ONT
- BOS
1 stop9h 25m
Delta
Deal found 4/29![Delta logo]()
$477
This United Airlines deal was found by Cheapflights users on 5/1. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/124:55 pm
BDL
- ONT
1 stop8h 56m
United Airlines
Wed 6/176:30 pm
ONT
- BDL
2 stops12h 15m
United Airlines
Deal found 5/1![United Airlines logo]()
$593
This Delta deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/232:16 pm
ALB
- ONT
1 stop10h 32m
Delta
Thu 5/2812:07 pm
ONT
- ALB
1 stop8h 51m
Delta
Deal found 4/29![Delta logo]()
$499
This United Airlines deal was found by Cheapflights users on 5/2. 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.
Sat 8/812:12 pm
BDL
- ONT
2 stops13h 38m
United Airlines
Fri 8/217:13 pm
ONT
- BDL
2 stops16h 16m
United Airlines
Deal found 5/2![United Airlines logo]()
$637
This Delta deal was found by Cheapflights users on 5/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/95:05 pm
BDL
- ONT
1 stop8h 09m
Delta
Fri 10/1610:59 pm
ONT
- BDL
1 stop8h 47m
Delta
Deal found 5/1![Delta logo]()
$557
This United Airlines deal was found by Cheapflights users on 5/2. 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 5/293:30 pm
BDL
- ONT
1 stop8h 12m
United Airlines
Wed 6/35:00 am
ONT
- BDL
1 stop7h 37m
United Airlines
Deal found 5/2![United Airlines logo]()
$668
This Delta deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/196:00 am
BDL
- ONT
1 stop7h 57m
Delta
Sun 5/3110:00 pm
ONT
- BDL
1 stop9h 47m
Delta
Deal found 4/30![Delta logo]()
$568
This Delta deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/42:07 pm
BDL
- ONT
1 stop10h 41m
Delta
Thu 6/1811:50 am
ONT
- BDL
1 stop9h 14m
Delta
Deal found 4/28![Delta logo]()
$659
Last-minute flights from Massachusetts to OntarioDiscover last-minute flight deals from Massachusetts to Ontario. Data last updated May 3, 2026 and is based on user searches.
Discover last-minute flight deals from Massachusetts to Ontario. Data last updated May 3, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/124:35 pm
BOS
- ONT
1 stop9h 00m
United Airlines
Sat 5/161:40 pm
ONT
- BOS
1 stop7h 19m
United Airlines
Deal found 4/28![United Airlines logo]()
$331
This Alaska Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/134:48 pm
BOS
- ONT
1 stop10h 10m
Alaska Airlines
Tue 5/195:57 pm
ONT
- BOS
1 stop9h 24m
Alaska Airlines
Deal found 4/29![Alaska Airlines logo]()
$317
This American Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/1311:15 am
BOS
- ONT
2 stops10h 23m
American Airlines
Tue 5/1912:19 pm
ONT
- BOS
1 stop9h 05m
American Airlines
Deal found 4/29![American Airlines logo]()
$332
This Delta deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/201:00 pm
ALB
- ONT
1 stop8h 36m
Delta
Wed 5/2712:07 pm
ONT
- ALB
1 stop8h 51m
Delta
Deal found 4/29![Delta logo]()
$297
This American Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/235:22 pm
BOS
- ONT
1 stop8h 14m
American Airlines
Thu 5/287:12 pm
ONT
- BOS
2 stops10h 29m
American Airlines
Deal found 4/28![American Airlines logo]()
$333
This Delta deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/245:35 am
BOS
- ONT
1 stop8h 22m
Delta
Thu 5/284:57 pm
ONT
- BOS
1 stop10h 23m
Delta
Deal found 4/28![Delta logo]()
$318
This Trip.com deal was found by Cheapflights users on 5/1. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/247:20 am
BOS
- ONT
1 stop10h 49m
Alaska Airlines
Tue 6/25:57 pm
ONT
- BOS
1 stop9h 27m
Alaska Airlines
Deal found 5/1![Alaska Airlines logo]()
$325
This United Airlines deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” 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 5/275:05 pm
BOS
- ONT
1 stop8h 46m
United Airlines
Thu 5/286:30 pm
ONT
- BOS
1 stop8h 28m
United Airlines
Deal found 4/30![United Airlines logo]()
$297
This American Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/274:46 pm
BOS
- ONT
1 stop8h 50m
American Airlines
Sat 5/3012:41 pm
ONT
- BOS
1 stop8h 23m
American Airlines
Deal found 4/29![American Airlines logo]()
$327
This American Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/297:00 am
BOS
- ONT
1 stop9h 28m
American Airlines
Mon 6/17:12 pm
ONT
- BOS
2 stops10h 29m
American Airlines
Deal found 4/28![American Airlines logo]()
$323
This Trip.com deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” 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.
Sat 5/306:00 am
BOS
- ONT
1 stop11h 55m
Alaska Airlines
Sat 6/65:57 pm
ONT
- BOS
1 stop9h 23m
Alaska Airlines
Deal found 4/30![Alaska Airlines logo]()
$296
This Alaska Airlines deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/306:00 am
BOS
- ONT
1 stop11h 55m
Alaska Airlines
Tue 6/25:57 pm
ONT
- BOS
1 stop9h 27m
Alaska Airlines
Deal found 4/30![Alaska Airlines logo]()
$309
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 May 3, 2026.
Search for one-way flight options from Massachusetts to Ontario. Find affordable one-way fares based on user searches. Data last updated May 3, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1910:07 am
BOS
- ONT
2 stops24h 28m
Frontier
Deal found 4/28![Frontier logo]()
$124
This Kiwi.com deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” 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.
Wed 5/276:00 am
BOS
- ONT
2 stops20h 49m
Frontier
Deal found 4/30![Frontier logo]()
$128
This American Airlines deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” 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.
Sun 5/246:20 am
BOS
- ONT
1 stop8h 45m
American Airlines
Deal found 4/30![American Airlines logo]()
$149
This Alaska Airlines deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” 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 6/37:20 am
BOS
- ONT
1 stop10h 49m
Alaska Airlines
Deal found 4/30![Alaska Airlines logo]()
$155
This Alaska Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/127:00 am
BOS
- ONT
1 stop10h 32m
Alaska Airlines
Deal found 4/28![Alaska Airlines logo]()
$159
This CheapOair deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/57:11 pm
BOS
- ONT
1 stop18h 59m
Alaska Airlines
Deal found 4/29![Alaska Airlines logo]()
$160
This Kiwi.com deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” 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.
Tue 8/186:05 pm
BDL
- ONT
1 stop24h 04m
Multiple Airlines
Deal found 4/30![Multiple Airlines logo]()
$161
This Kiwi.com deal was found by Cheapflights users on 5/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/235:40 pm
BDL
- ONT
1 stop24h 29m
Multiple Airlines
Deal found 5/2![Multiple Airlines logo]()
$165
This Delta deal was found by Cheapflights users on 5/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/2312:25 pm
BOS
- ONT
1 stop9h 11m
Delta
Deal found 5/1![Delta logo]()
$170
This Kiwi.com deal was found by Cheapflights users on 5/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/17:53 pm
ALB
- ONT
3 stops26h 39m
Multiple Airlines
Deal found 5/1![Multiple Airlines logo]()
$170
This Trip.com deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/134:48 pm
BOS
- ONT
1 stop10h 10m
Alaska Airlines
Deal found 4/29![Alaska Airlines logo]()
$175
This Trip.com deal was found by Cheapflights users on 5/2. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/166:00 am
BOS
- ONT
2 stops28h 35m
Frontier
Deal found 5/2![Frontier logo]()
$177
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 May 3, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $292 (United Airlines) |
One-way from | $124 (Kiwi.com) |
Popular in | April |
Cheapest in | January |
Average price | $343 |
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 2,558,603 searches. Data last updated May 3, 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 - ONT
BOSONT
Boston Logan Intl
Mon 8/31
6:25 pm-11:44 pm
1 stop8h 19m
Ontario
Thu 9/10
5:05 pm-6:09 am
1 stop10h 04m
$318
BostonOntario
BOS - ONT
BOSONT
Boston Logan Intl
Tue 8/11
5:45 am-11:04 am
1 stop8h 19m
Ontario
Tue 8/25
5:05 pm-6:09 am
1 stop10h 04m
$318
BostonOntario
BOS - ONT
BOSONT
Boston Logan Intl
Wed 6/3
7:20 am-3:09 pm
1 stop10h 49m
Ontario
Tue 6/9
5:57 pm-6:20 am
1 stop9h 23m
$334
BostonOntario
BOS - ONT
BOSONT
Boston Logan Intl
Tue 8/11
5:45 am-11:04 am
1 stop8h 19m
Ontario
Sat 8/29
5:05 pm-6:09 am
1 stop10h 04m
$339
BostonOntario
BOS - ONT
BOSONT
Boston Logan Intl
Wed 10/21
9:20 am-6:13 pm
1 stop11h 53m
Ontario
Sat 10/24
12:00 pm-12:05 am
1 stop9h 05m
$359
BostonOntario
BOS - ONT
BOSONT
Boston Logan Intl
Wed 10/14
5:15 am-12:20 pm
2 stops10h 05m
Ontario
Sun 10/18
11:55 pm-10:30 am
1 stop7h 35m
$384
AlbanyOntario
ALB - ONT
ALBONT
Albany Intl
Tue 8/25
1:59 pm-9:56 pm
2 stops10h 57m
Ontario
Tue 9/1
12:00 pm-11:38 pm
1 stop8h 38m
$392
BostonOntario
BOS - ONT
BOSONT
Boston Logan Intl
Wed 8/12
5:45 am-11:04 am
1 stop8h 19m
Ontario
Fri 8/28
12:00 pm-11:56 pm
1 stop8h 56m
$408
BostonOntario
BOS - ONT
BOSONT
Boston Logan Intl
Sun 5/24
7:20 am-3:09 pm
1 stop10h 49m
Ontario
Sat 5/30
5:57 pm-6:20 am
1 stop9h 23m
$418
AlbanyOntario
ALB - ONT
ALBONT
Albany Intl
Wed 7/1
6:00 am-12:05 pm
1 stop9h 05m
Ontario
Sun 7/5
11:55 pm-12:15 pm
2 stops9h 20m
$443
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
BDL-ONT
PVC-ONT
ALB-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
BDL-ONT
PVC-ONT
ALB-ONT
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 58 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.
What is the cheapest month to book a flight from Massachusetts to Ontario?
Currently, June is the cheapest month in which you can book a flight from Massachusetts to Ontario (average of $148). Flying from Massachusetts to Ontario in December is currently the most expensive (average of $270). 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?
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.
Alternative routes
Complete your trip
Flights by cabin class
Ontario flight routes
Other flight options
Popular flights
Top destinations
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 May 3, 2026.
Massachusetts and Ontario flights
Browse other Massachusetts and Ontario flight options. Last updated on May 3, 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 4 airlines flying from Massachusetts to Ontario
Discover the top 4 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 2,558,603 searches. Data last updated May 3, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$148 | Average$397 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$239 | Average$398 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$258 | Average$358 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$297 | Average$450 | FlexibilityNo cancel fee | On-time63% |