Cheap flights from Washington to Menlo Park

View AU$212 flight on Wed, 17 Sep. 2025Opens in a new window

Popular airlines from Washington to Menlo Park

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 35% on select hotels after you book a flight*
  • payments icon

    Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap Flights from Washington (WAS) to Menlo Park (SJC)

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Sat, 23 Aug. - Sat, 30 Aug.
DCA
Washington
SFO
San Francisco
AU$394 Return, just found
AU$394
Return
just found
Select Alaska Airlines flight, departing Sat, 23 Aug. from Washington to San Francisco, returning Sat, 30 Aug., priced at AU$394 just found
American Airlines
Sat, 23 Aug. - Sat, 30 Aug.
DCA
Washington
SFO
San Francisco
AU$425 Return, just found
AU$425
Return
just found
Select American Airlines flight, departing Sat, 23 Aug. from Washington to San Francisco, returning Sat, 30 Aug., priced at AU$425 just found
Delta
Sat, 6 Sep. - Sat, 13 Sep.
IAD
Washington
SFO
San Francisco
AU$425 Return, found 10 hours ago
AU$425
Return
found 10 hours ago
Select Delta flight, departing Sat, 6 Sep. from Washington to San Francisco, returning Sat, 13 Sep., priced at AU$425 found 10 hours ago
Delta
Sat, 23 Aug. - Sat, 30 Aug.
DCA
Washington
SFO
San Francisco
AU$425 Return, just found
AU$425
Return
just found
Select Delta flight, departing Sat, 23 Aug. from Washington to San Francisco, returning Sat, 30 Aug., priced at AU$425 just found
Delta
Sat, 6 Sep. - Sat, 13 Sep.
IAD
Washington
SFO
San Francisco
AU$441 Return, found 10 hours ago
AU$441
Return
found 10 hours ago
Select Delta flight, departing Sat, 6 Sep. from Washington to San Francisco, returning Sat, 13 Sep., priced at AU$441 found 10 hours ago
United
Sat, 6 Sep. - Sat, 13 Sep.
IAD
Washington
SFO
San Francisco
AU$516 Return, found 10 hours ago
AU$516
Return
found 10 hours ago
Select United flight, departing Sat, 6 Sep. from Washington to San Francisco, returning Sat, 13 Sep., priced at AU$516 found 10 hours ago

Find the cheapest month to fly from Washington (WAS) to San Francisco (SFO)

September is typically the cheapest month to fly

From AU$212 - AU$455 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.