Flights from Boston to Foster City

Cheapest flights from Boston

These prices were available within the past 7 days. Prices quoted are per person, round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Oct 1 - Tue, Oct 7

BOS

Logan Intl.

SFO

San Francisco Intl.

$237 Roundtrip, found 2 days ago

$237

Roundtrip

found 2 days ago

Select Alaska Airlines flight, departing Wed, Oct 1 from Logan Intl. to San Francisco Intl., returning Tue, Oct 7, priced at $237 found 2 days ago

Tue, Oct 7 - Tue, Oct 7

BOS

Logan Intl.

SFO

San Francisco Intl.

$237 Roundtrip, found 2 days ago

$237

Roundtrip

found 2 days ago

Select Delta flight, departing Tue, Oct 7 from Logan Intl. to San Francisco Intl., returning Tue, Oct 7, priced at $237 found 2 days ago

Sat, Oct 4 - Wed, Oct 8

BOS

Logan Intl.

SFO

San Francisco Intl.

$237 Roundtrip, found 2 days ago

$237

Roundtrip

found 2 days ago

Select United flight, departing Sat, Oct 4 from Logan Intl. to San Francisco Intl., returning Wed, Oct 8, priced at $237 found 2 days ago

Sat, Oct 4 - Wed, Oct 8

BOS

Logan Intl.

SFO

San Francisco Intl.

$237 Roundtrip, found 2 days ago

$237

Roundtrip

found 2 days ago

Select JetBlue Airways flight, departing Sat, Oct 4 from Logan Intl. to San Francisco Intl., returning Wed, Oct 8, priced at $237 found 2 days ago

Tue, Jul 1 - Mon, Jul 7

BOS

Logan Intl.

SJC

Norman Y. Mineta San Jose Intl.

$247 Roundtrip, found 5 days ago

$247

Roundtrip

found 5 days ago

Select American Airlines flight, departing Tue, Jul 1 from Logan Intl. to Norman Y. Mineta San Jose Intl., returning Mon, Jul 7, priced at $247 found 5 days ago

Sat, Oct 4 - Wed, Oct 8

BOS

Logan Intl.

SFO

San Francisco Intl.

$247 Roundtrip, found 2 days ago

$247

Roundtrip

found 2 days ago

Select United flight, departing Sat, Oct 4 from Logan Intl. to San Francisco Intl., returning Wed, Oct 8, priced at $247 found 2 days ago

Wed, Oct 1 - Sun, Oct 5

BOS

Logan Intl.

SFO

San Francisco Intl.

$248 Roundtrip, found 2 days ago

$248

Roundtrip

found 2 days ago

Select Hawaiian Airlines flight, departing Wed, Oct 1 from Logan Intl. to San Francisco Intl., returning Sun, Oct 5, priced at $248 found 2 days ago

Sat, Oct 4 - Wed, Oct 8

BOS

Logan Intl.

SFO

San Francisco Intl.

$257 Roundtrip, found 2 days ago

$257

Roundtrip

found 2 days ago

Select American Airlines flight, departing Sat, Oct 4 from Logan Intl. to San Francisco Intl., returning Wed, Oct 8, priced at $257 found 2 days ago

Mon, Oct 6 - Tue, Oct 7

BOS

Logan Intl.

SFO

San Francisco Intl.

$258 Roundtrip, found 2 days ago

$258

Roundtrip

found 2 days ago

Select Hawaiian Airlines flight, departing Mon, Oct 6 from Logan Intl. to San Francisco Intl., returning Tue, Oct 7, priced at $258 found 2 days ago

Thu, Oct 2 - Sun, Oct 5

BOS

Logan Intl.

SFO

San Francisco Intl.

$259 Roundtrip, found 2 days ago

$259

Roundtrip

found 2 days ago

Select Hawaiian Airlines flight, departing Thu, Oct 2 from Logan Intl. to San Francisco Intl., returning Sun, Oct 5, priced at $259 found 2 days ago

Wed, Oct 1 - Sat, Oct 11

BOS

Logan Intl.

SFO

San Francisco Intl.

$262 Roundtrip, found 2 days ago

$262

Roundtrip

found 2 days ago

Select Hawaiian Airlines flight, departing Wed, Oct 1 from Logan Intl. to San Francisco Intl., returning Sat, Oct 11, priced at $262 found 2 days ago

Mon, Jul 28 - Wed, Aug 13

BOS

Logan Intl.

SFO

San Francisco Intl.

$267 Roundtrip, found 2 days ago

$267

Roundtrip

found 2 days ago

Select JetBlue Airways flight, departing Mon, Jul 28 from Logan Intl. to San Francisco Intl., returning Wed, Aug 13, priced at $267 found 2 days ago

Mon, Sep 8 - Sun, Sep 14

BOS

Logan Intl.

SFO

San Francisco Intl.

$269 Roundtrip, found 2 days ago

$269

Roundtrip

found 2 days ago

Select Alaska Airlines flight, departing Mon, Sep 8 from Logan Intl. to San Francisco Intl., returning Sun, Sep 14, priced at $269 found 2 days ago

Mon, Sep 8 - Sun, Sep 14

BOS

Logan Intl.

SFO

San Francisco Intl.

$269 Roundtrip, found 2 days ago

$269

Roundtrip

found 2 days ago

Select United flight, departing Mon, Sep 8 from Logan Intl. to San Francisco Intl., returning Sun, Sep 14, priced at $269 found 2 days ago

Thu, Oct 2 - Sat, Oct 11

BOS

Logan Intl.

SFO

San Francisco Intl.

$273 Roundtrip, found 2 days ago

$273

Roundtrip

found 2 days ago

Select Hawaiian Airlines flight, departing Thu, Oct 2 from Logan Intl. to San Francisco Intl., returning Sat, Oct 11, priced at $273 found 2 days ago

Sat, Oct 4 - Wed, Oct 8

BOS

Logan Intl.

SFO

San Francisco Intl.

$276 Roundtrip, found 2 days ago

$276

Roundtrip

found 2 days ago

Select United flight, departing Sat, Oct 4 from Logan Intl. to San Francisco Intl., returning Wed, Oct 8, priced at $276 found 2 days ago

Mon, Jun 30 - Mon, Jul 7

BOS

Logan Intl.

SJC

Norman Y. Mineta San Jose Intl.

$350 Roundtrip, found 5 days ago

$350

Roundtrip

found 5 days ago

Select Spirit Airlines flight, departing Mon, Jun 30 from Logan Intl. to Norman Y. Mineta San Jose Intl., returning Mon, Jul 7, priced at $350 found 5 days ago

Tue, Jun 10 - Thu, Jun 19

BOS

Logan Intl.

OAK

Oakland Intl.

$368 Roundtrip, found 3 days ago

$368

Roundtrip

found 3 days ago

Select Spirit Airlines flight, departing Tue, Jun 10 from Logan Intl. to Oakland Intl., returning Thu, Jun 19, priced at $368 found 3 days ago

Mon, Jun 30 - Tue, Jul 8

MHT

Manchester-Boston Regional

SJC

Norman Y. Mineta San Jose Intl.

$425 Roundtrip, found 2 days ago

$425

Roundtrip

found 2 days ago

Select United flight, departing Mon, Jun 30 from Manchester-Boston Regional to Norman Y. Mineta San Jose Intl., returning Tue, Jul 8, priced at $425 found 2 days ago

Thu, Jun 12 - Fri, Jun 20

MHT

Manchester-Boston Regional

SFO

San Francisco Intl.

$597 Roundtrip, found 3 days ago

$597

Roundtrip

found 3 days ago

Select United flight, departing Thu, Jun 12 from Manchester-Boston Regional to San Francisco Intl., returning Fri, Jun 20, priced at $597 found 3 days ago