Cheap flights from Boston to Northern California

View AU$130 flight on Sat, 20 Sep. 2025Opens in a new window

Popular airlines from Boston to Northern California

  • American Airlines

    American Airlines

  • Alaska Airlines

    Alaska Airlines

  • Delta

    Delta

  • United

    United

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 35% on select hotels after you book a flight*
  • payments icon

    Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap Flights from Boston (BOS) to Northern California (ACV)

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Sat, 6 Sep. - Sat, 13 Sep.
BOS
Boston
SFO
San Francisco
AU$259 Return, found 1 day ago
AU$259
Return
found 1 day ago
Select Alaska Airlines flight, departing Sat, 6 Sep. from Boston to San Francisco, returning Sat, 13 Sep., priced at AU$259 found 1 day ago
Alaska Airlines
Sat, 6 Sep. - Sat, 13 Sep.
BOS
Boston
SFO
San Francisco
AU$282 Return, found 1 day ago
AU$282
Return
found 1 day ago
Select Alaska Airlines flight, departing Sat, 6 Sep. from Boston to San Francisco, returning Sat, 13 Sep., priced at AU$282 found 1 day ago
American Airlines
Sat, 6 Sep. - Sat, 13 Sep.
BOS
Boston
SFO
San Francisco
AU$290 Return, found 1 day ago
AU$290
Return
found 1 day ago
Select American Airlines flight, departing Sat, 6 Sep. from Boston to San Francisco, returning Sat, 13 Sep., priced at AU$290 found 1 day ago
Delta
Sat, 6 Sep. - Sat, 13 Sep.
BOS
Boston
SFO
San Francisco
AU$303 Return, found 1 day ago
AU$303
Return
found 1 day ago
Select Delta flight, departing Sat, 6 Sep. from Boston to San Francisco, returning Sat, 13 Sep., priced at AU$303 found 1 day ago
United
Sat, 6 Sep. - Sat, 13 Sep.
BOS
Boston
SFO
San Francisco
AU$338 Return, found 1 day ago
AU$338
Return
found 1 day ago
Select United flight, departing Sat, 6 Sep. from Boston to San Francisco, returning Sat, 13 Sep., priced at AU$338 found 1 day ago
Hawaiian Airlines
Fri, 15 Aug. - Mon, 18 Aug.
BOS
Boston
FAT
Fresno
AU$499 Return, found 4 days ago
AU$499
Return
found 4 days ago
Select Hawaiian Airlines flight, departing Fri, 15 Aug. from Boston to Fresno, returning Mon, 18 Aug., priced at AU$499 found 4 days ago

Find the cheapest month to fly from Boston (BOS) to San Francisco (SFO)

October is typically the cheapest month to fly

From AU$242 - AU$423 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.