Flights from Washington to San Francisco

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.

Mon, Aug 11 - Sat, Aug 16

BWI

Baltimore Washington Intl. Thurgood Marshall

SJO

Juan Santamaría Intl.

$299 Roundtrip, found 2 hours ago

$299

Roundtrip

found 2 hours ago

Select Copa flight, departing Mon, Aug 11 from Baltimore Washington Intl. Thurgood Marshall to Juan Santamaría Intl., returning Sat, Aug 16, priced at $299 found 2 hours ago

Mon, Aug 11 - Sat, Aug 16

BWI

Baltimore Washington Intl. Thurgood Marshall

SJO

Juan Santamaría Intl.

$301 Roundtrip, found 2 hours ago

$301

Roundtrip

found 2 hours ago

Select American Airlines flight, departing Mon, Aug 11 from Baltimore Washington Intl. Thurgood Marshall to Juan Santamaría Intl., returning Sat, Aug 16, priced at $301 found 2 hours ago

Mon, Aug 11 - Sat, Aug 16

BWI

Baltimore Washington Intl. Thurgood Marshall

SJO

Juan Santamaría Intl.

$307 Roundtrip, found 2 hours ago

$307

Roundtrip

found 2 hours ago

Select American Airlines flight, departing Mon, Aug 11 from Baltimore Washington Intl. Thurgood Marshall to Juan Santamaría Intl., returning Sat, Aug 16, priced at $307 found 2 hours ago

Mon, Aug 11 - Sat, Aug 16

BWI

Baltimore Washington Intl. Thurgood Marshall

SJO

Juan Santamaría Intl.

$313 Roundtrip, found 2 hours ago

$313

Roundtrip

found 2 hours ago

Select American Airlines flight, departing Mon, Aug 11 from Baltimore Washington Intl. Thurgood Marshall to Juan Santamaría Intl., returning Sat, Aug 16, priced at $313 found 2 hours ago

Mon, Aug 11 - Sat, Aug 16

BWI

Baltimore Washington Intl. Thurgood Marshall

SJO

Juan Santamaría Intl.

$314 Roundtrip, found 2 hours ago

$314

Roundtrip

found 2 hours ago

Select Copa flight, departing Mon, Aug 11 from Baltimore Washington Intl. Thurgood Marshall to Juan Santamaría Intl., returning Sat, Aug 16, priced at $314 found 2 hours ago

Mon, Aug 11 - Sat, Aug 16

BWI

Baltimore Washington Intl. Thurgood Marshall

SJO

Juan Santamaría Intl.

$321 Roundtrip, found 2 hours ago

$321

Roundtrip

found 2 hours ago

Select American Airlines flight, departing Mon, Aug 11 from Baltimore Washington Intl. Thurgood Marshall to Juan Santamaría Intl., returning Sat, Aug 16, priced at $321 found 2 hours ago

Tue, Aug 12 - Wed, Aug 13

BWI

Baltimore Washington Intl. Thurgood Marshall

SJO

Juan Santamaría Intl.

$322 Roundtrip, found 11 hours ago

$322

Roundtrip

found 11 hours ago

Select Spirit Airlines flight, departing Tue, Aug 12 from Baltimore Washington Intl. Thurgood Marshall to Juan Santamaría Intl., returning Wed, Aug 13, priced at $322 found 11 hours ago

Mon, Aug 11 - Sat, Aug 16

DCA

Ronald Reagan Washington National

SJO

Juan Santamaría Intl.

$327 Roundtrip, found 1 day ago

$327

Roundtrip

found 1 day ago

Select JetBlue Airways flight, departing Mon, Aug 11 from Ronald Reagan Washington National to Juan Santamaría Intl., returning Sat, Aug 16, priced at $327 found 1 day ago

Tue, Aug 12 - Tue, Aug 19

BWI

Baltimore Washington Intl. Thurgood Marshall

SJO

Juan Santamaría Intl.

$330 Roundtrip, found 11 hours ago

$330

Roundtrip

found 11 hours ago

Select Spirit Airlines flight, departing Tue, Aug 12 from Baltimore Washington Intl. Thurgood Marshall to Juan Santamaría Intl., returning Tue, Aug 19, priced at $330 found 11 hours ago

Mon, Aug 11 - Sat, Aug 16

BWI

Baltimore Washington Intl. Thurgood Marshall

SJO

Juan Santamaría Intl.

$333 Roundtrip, found 2 hours ago

$333

Roundtrip

found 2 hours ago

Select American Airlines flight, departing Mon, Aug 11 from Baltimore Washington Intl. Thurgood Marshall to Juan Santamaría Intl., returning Sat, Aug 16, priced at $333 found 2 hours ago

Mon, Aug 11 - Sat, Aug 16

BWI

Baltimore Washington Intl. Thurgood Marshall

SJO

Juan Santamaría Intl.

$333 Roundtrip, found 2 hours ago

$333

Roundtrip

found 2 hours ago

Select American Airlines flight, departing Mon, Aug 11 from Baltimore Washington Intl. Thurgood Marshall to Juan Santamaría Intl., returning Sat, Aug 16, priced at $333 found 2 hours ago

Sun, Aug 10 - Wed, Aug 13

DCA

Ronald Reagan Washington National

SJO

Juan Santamaría Intl.

$334 Roundtrip, found 6 days ago

$334

Roundtrip

found 6 days ago

Select Delta flight, departing Sun, Aug 10 from Ronald Reagan Washington National to Juan Santamaría Intl., returning Wed, Aug 13, priced at $334 found 6 days ago

Wed, Aug 13 - Sat, Aug 16

BWI

Baltimore Washington Intl. Thurgood Marshall

SJO

Juan Santamaría Intl.

$338 Roundtrip, found 2 days ago

$338

Roundtrip

found 2 days ago

Select Copa flight, departing Wed, Aug 13 from Baltimore Washington Intl. Thurgood Marshall to Juan Santamaría Intl., returning Sat, Aug 16, priced at $338 found 2 days ago

Mon, Aug 11 - Sat, Aug 16

IAD

Washington Dulles Intl.

SJO

Juan Santamaría Intl.

$341 Roundtrip, found 1 day ago

$341

Roundtrip

found 1 day ago

Select United flight, departing Mon, Aug 11 from Washington Dulles Intl. to Juan Santamaría Intl., returning Sat, Aug 16, priced at $341 found 1 day ago

Mon, Aug 11 - Sat, Aug 16

BWI

Baltimore Washington Intl. Thurgood Marshall

SJO

Juan Santamaría Intl.

$343 Roundtrip, found 2 hours ago

$343

Roundtrip

found 2 hours ago

Select Spirit Airlines flight, departing Mon, Aug 11 from Baltimore Washington Intl. Thurgood Marshall to Juan Santamaría Intl., returning Sat, Aug 16, priced at $343 found 2 hours ago

Mon, Aug 11 - Sat, Aug 16

BWI

Baltimore Washington Intl. Thurgood Marshall

SJO

Juan Santamaría Intl.

$345 Roundtrip, found 2 hours ago

$345

Roundtrip

found 2 hours ago

Select Copa flight, departing Mon, Aug 11 from Baltimore Washington Intl. Thurgood Marshall to Juan Santamaría Intl., returning Sat, Aug 16, priced at $345 found 2 hours ago

Wed, Aug 13 - Mon, Aug 18

IAD

Washington Dulles Intl.

SJO

Juan Santamaría Intl.

$346 Roundtrip, found 1 day ago

$346

Roundtrip

found 1 day ago

Select American Airlines flight, departing Wed, Aug 13 from Washington Dulles Intl. to Juan Santamaría Intl., returning Mon, Aug 18, priced at $346 found 1 day ago

Mon, Aug 11 - Sat, Aug 16

IAD

Washington Dulles Intl.

SJO

Juan Santamaría Intl.

$353 Roundtrip, found 1 day ago

$353

Roundtrip

found 1 day ago

Select avianca flight, departing Mon, Aug 11 from Washington Dulles Intl. to Juan Santamaría Intl., returning Sat, Aug 16, priced at $353 found 1 day ago

Mon, Aug 11 - Sat, Aug 16

DCA

Ronald Reagan Washington National

SJO

Juan Santamaría Intl.

$355 Roundtrip, found 1 day ago

$355

Roundtrip

found 1 day ago

Select United flight, departing Mon, Aug 11 from Ronald Reagan Washington National to Juan Santamaría Intl., returning Sat, Aug 16, priced at $355 found 1 day ago

Mon, Aug 11 - Sat, Aug 16

IAD

Washington Dulles Intl.

SJO

Juan Santamaría Intl.

$1,432 Roundtrip, found 1 day ago

$1,432

Roundtrip

found 1 day ago

Select Aeromexico flight, departing Mon, Aug 11 from Washington Dulles Intl. to Juan Santamaría Intl., returning Sat, Aug 16, priced at $1,432 found 1 day ago