$99 Cheap United flights San Francisco (SFO) to Boston (BOS)

$99 Cheap United flights San Francisco (SFO) to Boston (BOS)

Prices were available within the past 7 days and start at $99 for one-way flights and $317 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, May 14 - Sun, May 18

SFO

San Francisco

BOS

Boston

$317 Roundtrip, found 20 hours ago

$317

Roundtrip

found 20 hours ago

Select United flight, departing Wed, May 14 from San Francisco to Boston, returning Sun, May 18, priced at $317 found 20 hours ago

Tue, Jul 1 - Sat, Jul 12

SFO

San Francisco

BOS

Boston

$319 Roundtrip, found 5 days ago

$319

Roundtrip

found 5 days ago

Select United flight, departing Tue, Jul 1 from San Francisco to Boston, returning Sat, Jul 12, priced at $319 found 5 days ago

Wed, May 14 - Sun, May 18

SFO

San Francisco

BOS

Boston

$321 Roundtrip, found 20 hours ago

$321

Roundtrip

found 20 hours ago

Select United flight, departing Wed, May 14 from San Francisco to Boston, returning Sun, May 18, priced at $321 found 20 hours ago

Wed, May 14 - Sun, May 18

SFO

San Francisco

BOS

Boston

$331 Roundtrip, found 20 hours ago

$331

Roundtrip

found 20 hours ago

Select United flight, departing Wed, May 14 from San Francisco to Boston, returning Sun, May 18, priced at $331 found 20 hours ago

Tue, Jul 1 - Sat, Jul 12

SFO

San Francisco

BOS

Boston

$334 Roundtrip, found 5 days ago

$334

Roundtrip

found 5 days ago

Select United flight, departing Tue, Jul 1 from San Francisco to Boston, returning Sat, Jul 12, priced at $334 found 5 days ago

Wed, May 14 - Sun, May 18

SFO

San Francisco

BOS

Boston

$348 Roundtrip, found 20 hours ago

$348

Roundtrip

found 20 hours ago

Select United flight, departing Wed, May 14 from San Francisco to Boston, returning Sun, May 18, priced at $348 found 20 hours ago