Flights from Washington to Castro Valley

Cheapest flights from Washington

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.

Fri, Oct 17 - Tue, Oct 21

BWI

Baltimore Washington Intl. Thurgood Marshall

SJC

Norman Y. Mineta San Jose Intl.

$190 Roundtrip, found 1 hour ago

$190

Roundtrip

found 1 hour ago

Select Spirit Airlines flight, departing Fri, Oct 17 from Baltimore Washington Intl. Thurgood Marshall to Norman Y. Mineta San Jose Intl., returning Tue, Oct 21, priced at $190 found 1 hour ago

Fri, Oct 17 - Tue, Oct 21

BWI

Baltimore Washington Intl. Thurgood Marshall

SJC

Norman Y. Mineta San Jose Intl.

$228 Roundtrip, found 1 hour ago

$228

Roundtrip

found 1 hour ago

Select Spirit Airlines flight, departing Fri, Oct 17 from Baltimore Washington Intl. Thurgood Marshall to Norman Y. Mineta San Jose Intl., returning Tue, Oct 21, priced at $228 found 1 hour ago

Tue, Sep 9 - Tue, Sep 16

DCA

Ronald Reagan Washington National

SJC

Norman Y. Mineta San Jose Intl.

$250 Roundtrip, found 1 day ago

$250

Roundtrip

found 1 day ago

Select Hawaiian Airlines flight, departing Tue, Sep 9 from Ronald Reagan Washington National to Norman Y. Mineta San Jose Intl., returning Tue, Sep 16, priced at $250 found 1 day ago

Sat, Sep 6 - Tue, Sep 16

DCA

Ronald Reagan Washington National

SFO

San Francisco Intl.

$257 Roundtrip, found 1 day ago

$257

Roundtrip

found 1 day ago

Select Hawaiian Airlines flight, departing Sat, Sep 6 from Ronald Reagan Washington National to San Francisco Intl., returning Tue, Sep 16, priced at $257 found 1 day ago

Thu, Sep 11 - Wed, Sep 17

DCA

Ronald Reagan Washington National

SFO

San Francisco Intl.

$259 Roundtrip, found 1 day ago

$259

Roundtrip

found 1 day ago

Select JetBlue Airways flight, departing Thu, Sep 11 from Ronald Reagan Washington National to San Francisco Intl., returning Wed, Sep 17, priced at $259 found 1 day ago

Tue, Sep 9 - Thu, Sep 18

DCA

Ronald Reagan Washington National

SJC

Norman Y. Mineta San Jose Intl.

$263 Roundtrip, found 1 day ago

$263

Roundtrip

found 1 day ago

Select Hawaiian Airlines flight, departing Tue, Sep 9 from Ronald Reagan Washington National to Norman Y. Mineta San Jose Intl., returning Thu, Sep 18, priced at $263 found 1 day ago

Thu, Sep 4 - Tue, Sep 16

DCA

Ronald Reagan Washington National

SJC

Norman Y. Mineta San Jose Intl.

$264 Roundtrip, found 1 day ago

$264

Roundtrip

found 1 day ago

Select United flight, departing Thu, Sep 4 from Ronald Reagan Washington National to Norman Y. Mineta San Jose Intl., returning Tue, Sep 16, priced at $264 found 1 day ago

Fri, Oct 17 - Tue, Oct 21

BWI

Baltimore Washington Intl. Thurgood Marshall

SJC

Norman Y. Mineta San Jose Intl.

$273 Roundtrip, found 1 hour ago

$273

Roundtrip

found 1 hour ago

Select United flight, departing Fri, Oct 17 from Baltimore Washington Intl. Thurgood Marshall to Norman Y. Mineta San Jose Intl., returning Tue, Oct 21, priced at $273 found 1 hour ago

Thu, Oct 23 - Mon, Oct 27

DCA

Ronald Reagan Washington National

SFO

San Francisco Intl.

$276 Roundtrip, found 3 days ago

$276

Roundtrip

found 3 days ago

Select JetBlue Airways flight, departing Thu, Oct 23 from Ronald Reagan Washington National to San Francisco Intl., returning Mon, Oct 27, priced at $276 found 3 days ago

Thu, Sep 4 - Thu, Sep 18

DCA

Ronald Reagan Washington National

SJC

Norman Y. Mineta San Jose Intl.

$277 Roundtrip, found 1 day ago

$277

Roundtrip

found 1 day ago

Select Alaska Airlines flight, departing Thu, Sep 4 from Ronald Reagan Washington National to Norman Y. Mineta San Jose Intl., returning Thu, Sep 18, priced at $277 found 1 day ago

Sat, Sep 6 - Wed, Sep 17

DCA

Ronald Reagan Washington National

SJC

Norman Y. Mineta San Jose Intl.

$277 Roundtrip, found 1 day ago

$277

Roundtrip

found 1 day ago

Select Delta flight, departing Sat, Sep 6 from Ronald Reagan Washington National to Norman Y. Mineta San Jose Intl., returning Wed, Sep 17, priced at $277 found 1 day ago

Mon, Sep 8 - Tue, Sep 16

DCA

Ronald Reagan Washington National

SFO

San Francisco Intl.

$277 Roundtrip, found 1 day ago

$277

Roundtrip

found 1 day ago

Select Hawaiian Airlines flight, departing Mon, Sep 8 from Ronald Reagan Washington National to San Francisco Intl., returning Tue, Sep 16, priced at $277 found 1 day ago

Thu, Dec 4 - Fri, Dec 5

DCA

Ronald Reagan Washington National

SFO

San Francisco Intl.

$279 Roundtrip, found 4 days ago

$279

Roundtrip

found 4 days ago

Select JetBlue Airways flight, departing Thu, Dec 4 from Ronald Reagan Washington National to San Francisco Intl., returning Fri, Dec 5, priced at $279 found 4 days ago

Thu, Sep 4 - Tue, Sep 16

DCA

Ronald Reagan Washington National

SJC

Norman Y. Mineta San Jose Intl.

$280 Roundtrip, found 1 day ago

$280

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Sep 4 from Ronald Reagan Washington National to Norman Y. Mineta San Jose Intl., returning Tue, Sep 16, priced at $280 found 1 day ago

Tue, Sep 9 - Thu, Sep 18

DCA

Ronald Reagan Washington National

SJC

Norman Y. Mineta San Jose Intl.

$283 Roundtrip, found 1 day ago

$283

Roundtrip

found 1 day ago

Select United flight, departing Tue, Sep 9 from Ronald Reagan Washington National to Norman Y. Mineta San Jose Intl., returning Thu, Sep 18, priced at $283 found 1 day ago

Thu, Sep 4 - Tue, Sep 16

DCA

Ronald Reagan Washington National

SJC

Norman Y. Mineta San Jose Intl.

$285 Roundtrip, found 1 day ago

$285

Roundtrip

found 1 day ago

Select American Airlines flight, departing Thu, Sep 4 from Ronald Reagan Washington National to Norman Y. Mineta San Jose Intl., returning Tue, Sep 16, priced at $285 found 1 day ago

Thu, Dec 4 - Fri, Dec 5

DCA

Ronald Reagan Washington National

SFO

San Francisco Intl.

$286 Roundtrip, found 4 days ago

$286

Roundtrip

found 4 days ago

Select JetBlue Airways flight, departing Thu, Dec 4 from Ronald Reagan Washington National to San Francisco Intl., returning Fri, Dec 5, priced at $286 found 4 days ago

Tue, Sep 9 - Thu, Sep 18

DCA

Ronald Reagan Washington National

SFO

San Francisco Intl.

$288 Roundtrip, found 1 day ago

$288

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Tue, Sep 9 from Ronald Reagan Washington National to San Francisco Intl., returning Thu, Sep 18, priced at $288 found 1 day ago

Fri, Sep 12 - Sat, Sep 13

IAD

Washington Dulles Intl.

SFO

San Francisco Intl.

$297 Roundtrip, found 6 days ago

$297

Roundtrip

found 6 days ago

Select United flight, departing Fri, Sep 12 from Washington Dulles Intl. to San Francisco Intl., returning Sat, Sep 13, priced at $297 found 6 days ago

Sun, Oct 12 - Sat, Oct 18

BWI

Baltimore Washington Intl. Thurgood Marshall

SFO

San Francisco Intl.

$308 Roundtrip, found 3 days ago

$308

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Sun, Oct 12 from Baltimore Washington Intl. Thurgood Marshall to San Francisco Intl., returning Sat, Oct 18, priced at $308 found 3 days ago