Flights from Boston to Union 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.

Tue, Sep 2 - Tue, Sep 9

BOS

Logan Intl.

SFO

San Francisco Intl.

$237 Roundtrip, found 5 days ago

$237

Roundtrip

found 5 days ago

Select Hawaiian Airlines flight, departing Tue, Sep 2 from Logan Intl. to San Francisco Intl., returning Tue, Sep 9, priced at $237 found 5 days ago

Wed, Sep 3 - Tue, Sep 9

BOS

Logan Intl.

SFO

San Francisco Intl.

$237 Roundtrip, found 5 days ago

$237

Roundtrip

found 5 days ago

Select Alaska Airlines flight, departing Wed, Sep 3 from Logan Intl. to San Francisco Intl., returning Tue, Sep 9, priced at $237 found 5 days ago

Tue, Jul 1 - Mon, Jul 7

BOS

Logan Intl.

SJC

Norman Y. Mineta San Jose Intl.

$247 Roundtrip, found 1 day ago

$247

Roundtrip

found 1 day 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 1 day ago

Tue, Sep 2 - Sun, Sep 7

BOS

Logan Intl.

SFO

San Francisco Intl.

$248 Roundtrip, found 5 days ago

$248

Roundtrip

found 5 days ago

Select Hawaiian Airlines flight, departing Tue, Sep 2 from Logan Intl. to San Francisco Intl., returning Sun, Sep 7, priced at $248 found 5 days ago

Fri, Sep 5 - Wed, Sep 10

BOS

Logan Intl.

SFO

San Francisco Intl.

$248 Roundtrip, found 5 days ago

$248

Roundtrip

found 5 days ago

Select United flight, departing Fri, Sep 5 from Logan Intl. to San Francisco Intl., returning Wed, Sep 10, priced at $248 found 5 days ago

Sun, Sep 7 - Tue, Sep 9

BOS

Logan Intl.

SFO

San Francisco Intl.

$248 Roundtrip, found 5 days ago

$248

Roundtrip

found 5 days ago

Select JetBlue Airways flight, departing Sun, Sep 7 from Logan Intl. to San Francisco Intl., returning Tue, Sep 9, priced at $248 found 5 days ago

Fri, Sep 5 - Wed, Sep 10

BOS

Logan Intl.

SFO

San Francisco Intl.

$258 Roundtrip, found 5 days ago

$258

Roundtrip

found 5 days ago

Select Alaska Airlines flight, departing Fri, Sep 5 from Logan Intl. to San Francisco Intl., returning Wed, Sep 10, priced at $258 found 5 days ago

Fri, Sep 5 - Wed, Sep 10

BOS

Logan Intl.

SFO

San Francisco Intl.

$258 Roundtrip, found 5 days ago

$258

Roundtrip

found 5 days ago

Select United flight, departing Fri, Sep 5 from Logan Intl. to San Francisco Intl., returning Wed, Sep 10, priced at $258 found 5 days ago

Fri, Sep 5 - Wed, Sep 10

BOS

Logan Intl.

SFO

San Francisco Intl.

$258 Roundtrip, found 5 days ago

$258

Roundtrip

found 5 days ago

Select Delta flight, departing Fri, Sep 5 from Logan Intl. to San Francisco Intl., returning Wed, Sep 10, priced at $258 found 5 days ago

Thu, Sep 4 - Sun, Sep 7

BOS

Logan Intl.

SFO

San Francisco Intl.

$259 Roundtrip, found 5 days ago

$259

Roundtrip

found 5 days ago

Select Alaska Airlines flight, departing Thu, Sep 4 from Logan Intl. to San Francisco Intl., returning Sun, Sep 7, priced at $259 found 5 days ago

Fri, Sep 5 - Wed, Sep 10

BOS

Logan Intl.

SFO

San Francisco Intl.

$268 Roundtrip, found 5 days ago

$268

Roundtrip

found 5 days ago

Select Alaska Airlines flight, departing Fri, Sep 5 from Logan Intl. to San Francisco Intl., returning Wed, Sep 10, priced at $268 found 5 days ago

Fri, Sep 5 - Wed, Sep 10

BOS

Logan Intl.

SFO

San Francisco Intl.

$268 Roundtrip, found 5 days ago

$268

Roundtrip

found 5 days ago

Select JetBlue Airways flight, departing Fri, Sep 5 from Logan Intl. to San Francisco Intl., returning Wed, Sep 10, priced at $268 found 5 days ago

Fri, Sep 5 - Wed, Sep 10

BOS

Logan Intl.

SFO

San Francisco Intl.

$269 Roundtrip, found 5 days ago

$269

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Fri, Sep 5 from Logan Intl. to San Francisco Intl., returning Wed, Sep 10, priced at $269 found 5 days ago

Tue, Jul 1 - Tue, Jul 8

BOS

Logan Intl.

SJC

Norman Y. Mineta San Jose Intl.

$277 Roundtrip, found 1 day ago

$277

Roundtrip

found 1 day ago

Select Hawaiian Airlines flight, departing Tue, Jul 1 from Logan Intl. to Norman Y. Mineta San Jose Intl., returning Tue, Jul 8, priced at $277 found 1 day ago

Fri, Sep 5 - Wed, Sep 10

BOS

Logan Intl.

SFO

San Francisco Intl.

$278 Roundtrip, found 5 days ago

$278

Roundtrip

found 5 days ago

Select American Airlines flight, departing Fri, Sep 5 from Logan Intl. to San Francisco Intl., returning Wed, Sep 10, priced at $278 found 5 days ago

Mon, Jun 30 - Mon, Jul 7

BOS

Logan Intl.

SJC

Norman Y. Mineta San Jose Intl.

$278 Roundtrip, found 1 day ago

$278

Roundtrip

found 1 day 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 $278 found 1 day ago

Fri, Sep 5 - Wed, Sep 10

BOS

Logan Intl.

SFO

San Francisco Intl.

$279 Roundtrip, found 5 days ago

$279

Roundtrip

found 5 days ago

Select JetBlue Airways flight, departing Fri, Sep 5 from Logan Intl. to San Francisco Intl., returning Wed, Sep 10, priced at $279 found 5 days ago

Wed, Jun 4 - Sun, Jun 8

BOS

Logan Intl.

SFO

San Francisco Intl.

$312 Roundtrip, found 5 days ago

$312

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Wed, Jun 4 from Logan Intl. to San Francisco Intl., returning Sun, Jun 8, priced at $312 found 5 days ago

Tue, Sep 9 - Tue, Sep 16

PVD

T.F. Green

SJC

Norman Y. Mineta San Jose Intl.

$343 Roundtrip, found 4 days ago

$343

Roundtrip

found 4 days ago

Select Delta flight, departing Tue, Sep 9 from T.F. Green to Norman Y. Mineta San Jose Intl., returning Tue, Sep 16, priced at $343 found 4 days ago

Mon, Jun 30 - Mon, Jul 7

BOS

Logan Intl.

SJC

Norman Y. Mineta San Jose Intl.

$350 Roundtrip, found 1 day ago

$350

Roundtrip

found 1 day 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 1 day ago