Earn point on your loyalty program!arrow arc left

Cheap flights from Ontario (ONT) to Boston (BOS)

Know your dates, get live prices in seconds
airplane logo

pin logo

calendar
Departure
calendar backward
Return
airplane logo
1 Adults (11+)
0 Children (2~11)
0 Infants (0~2)
Save up to 31%
Book Flight + Hotel at the same time

How to find the cheapest flight from Ontario (ONT) to Boston (BOS)

How to find the cheapest flight from Ontario (ONT) to Boston (BOS)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Ontario (ONT) to Boston (BOS)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Ontario (ONT) to Boston (BOS)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.

Cheap flights from Ontario to Boston in May , June 2026

19 May - 03 Jun $ 314.00
ONT
Ontario
Alaska Airlines
1 STOPS
BOS
Boston
BOS
Boston
Alaska Airlines
1 STOPS
ONT
Ontario
Pick dates
12 May - 03 Jun $ 365.00
ONT
Ontario
Alaska Airlines
1 STOPS
BOS
Boston
BOS
Boston
Alaska Airlines
1 STOPS
ONT
Ontario
Pick dates
12 May - 06 Jun $ 449.00
ONT
Ontario
Alaska Airlines
1 STOPS
BOS
Boston
BOS
Boston
Alaska Airlines
1 STOPS
ONT
Ontario
Pick dates

Last minute flights from Ontario to Boston

12 May - 01 Jun $ 503.00
ONT
Ontario
Alaska Airlines
1 STOPS
BOS
Boston
BOS
Boston
Alaska Airlines
1 STOPS
ONT
Ontario
Pick dates
29 May - 31 May $ 537.00
ONT
Ontario
United Airlines
1 STOPS
BOS
Boston
BOS
Boston
United Airlines
1 STOPS
ONT
Ontario
Pick dates
12 May - 31 May $ 858.00
ONT
Ontario
Alaska Airlines
1 STOPS
BOS
Boston
BOS
Boston
Alaska Airlines
1 STOPS
ONT
Ontario
Pick dates

One-way flights to Boston from Ontario

6:00 AM - 10:17 AM
United Airlines
1 Stops
10h 7m
ONT - BOS
$ 149
Kiwi
Pick dates
10:39 AM - 3:21 PM
Alaska Airlines
1 Stops
10h 20m
ONT - BOS
$ 211
Kiwi
Pick dates
1:40 PM - 5:51 PM
United Airlines
1 Stops
7h 19m
ONT - BOS
$ 230
Kiwi
Pick dates

How to find the cheapest flight from Ontario (ONT) to Boston (BOS)

Related info for your journey
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Ontario (ONT) to Boston (BOS)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Ontario (ONT) to Boston (BOS)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.