Earn point on your loyalty program!arrow arc left

Cheap flights from Boston (BOS) to San Diego (SAN)

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 Boston (BOS) to San Diego (SAN)

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

Cheap flights from Boston to San Diego in September , October 2026

30 Sep - 29 Oct $ 503.00
BOS
Boston
Alaska Airlines
DIRECT
SAN
San Diego
SAN
San Diego
Alaska Airlines
DIRECT
BOS
Boston
Pick dates
29 Sep - 20 Oct $ 514.00
BOS
Boston
Alaska Airlines
1 STOPS
SAN
San Diego
SAN
San Diego
Alaska Airlines
DIRECT
BOS
Boston
Pick dates
30 Sep - 10 Oct $ 645.00
BOS
Boston
Alaska Airlines
DIRECT
SAN
San Diego
SAN
San Diego
Alaska Airlines
DIRECT
BOS
Boston
Pick dates

Last minute flights from Boston to San Diego

29 Sep - 30 Sep $ 751.00
BOS
Boston
Alaska Airlines
DIRECT
SAN
San Diego
SAN
San Diego
Alaska Airlines
DIRECT
BOS
Boston
Pick dates
29 Sep - 30 Sep $ 761.00
BOS
Boston
Alaska Airlines
1 STOPS
SAN
San Diego
SAN
San Diego
Alaska Airlines
DIRECT
BOS
Boston
Pick dates
29 Sep - 30 Sep $ 1,406.00
BOS
Boston
Alaska Airlines
DIRECT
SAN
San Diego
SAN
San Diego
Alaska Airlines
DIRECT
BOS
Boston
Pick dates

One-way flights to San Diego from Boston

8:00 AM - 8:00 AM
Alaska Airlines
0 Stops
6h 12m
BOS - SAN
$ 376
Kiwi
Pick dates
9:30 AM - 9:30 AM
JetBlue Airways
0 Stops
6h 4m
BOS - SAN
$ 394
Kiwi
Pick dates
4:00 PM - 4:00 PM
JetBlue Airways
0 Stops
6h 7m
BOS - SAN
$ 394
Kiwi
Pick dates

How to find the cheapest flight from Boston (BOS) to San Diego (SAN)

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 Boston (BOS) to San Diego (SAN)
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 Boston (BOS) to San Diego (SAN)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.