$140 Cheap United flights Boston (BOS) to San Francisco (SFO)

$140 Cheap United flights Boston (BOS) to San Francisco (SFO)

Prices were available within the past 7 days and start at $140 for one-way flights and $279 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Nov 26 - Fri, Dec 5

BOS

Boston

SFO

San Francisco

$279 Roundtrip, found 2 days ago

$279

Roundtrip

found 2 days ago

Select United flight, departing Wed, Nov 26 from Boston to San Francisco, returning Fri, Dec 5, priced at $279 found 2 days ago

Mon, Feb 2 - Mon, Feb 16

BOS

Boston

SFO

San Francisco

$303 Roundtrip, found 3 days ago

$303

Roundtrip

found 3 days ago

Select United flight, departing Mon, Feb 2 from Boston to San Francisco, returning Mon, Feb 16, priced at $303 found 3 days ago

Sat, Nov 8 - Sat, Nov 15

BOS

Boston

SFO

San Francisco

$310 Roundtrip, found 2 days ago

$310

Roundtrip

found 2 days ago

Select United flight, departing Sat, Nov 8 from Boston to San Francisco, returning Sat, Nov 15, priced at $310 found 2 days ago

Mon, Nov 24 - Wed, Dec 3

BOS

Boston

SFO

San Francisco

$314 Roundtrip, found 4 days ago

$314

Roundtrip

found 4 days ago

Select United flight, departing Mon, Nov 24 from Boston to San Francisco, returning Wed, Dec 3, priced at $314 found 4 days ago

Mon, Feb 2 - Mon, Feb 16

BOS

Boston

SFO

San Francisco

$316 Roundtrip, found 3 days ago

$316

Roundtrip

found 3 days ago

Select United flight, departing Mon, Feb 2 from Boston to San Francisco, returning Mon, Feb 16, priced at $316 found 3 days ago

Sat, Nov 8 - Sat, Nov 15

BOS

Boston

SFO

San Francisco

$317 Roundtrip, found 2 days ago

$317

Roundtrip

found 2 days ago

Select United flight, departing Sat, Nov 8 from Boston to San Francisco, returning Sat, Nov 15, priced at $317 found 2 days ago