Cheap flights from Seattle to Silicon Valley

View AU$104 flight on Tue, 23 Sep. 2025Opens in a new window

Popular airlines from Seattle to Silicon Valley

  • Jetstar

    Jetstar

  • Qantas Airways

    Qantas Airways

  • Virgin Australia

    Virgin Australia

  • Scoot

    Scoot

  • American Airlines

    American Airlines

  • Emirates

    Emirates

  • United

    United

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Cheap Flights from Seattle (SEA) to Silicon Valley (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
Tue, 19 Aug. - Tue, 26 Aug.
SEA
Seattle
SFO
San Francisco
AU$208 Return, found 5 hours ago
AU$208
Return
found 5 hours ago
Select Alaska Airlines flight, departing Tue, 19 Aug. from Seattle to San Francisco, returning Tue, 26 Aug., priced at AU$208 found 5 hours ago
Delta
Tue, 19 Aug. - Tue, 26 Aug.
SEA
Seattle
SFO
San Francisco
AU$208 Return, found 5 hours ago
AU$208
Return
found 5 hours ago
Select Delta flight, departing Tue, 19 Aug. from Seattle to San Francisco, returning Tue, 26 Aug., priced at AU$208 found 5 hours ago
Alaska Airlines
Sat, 20 Sep. - Sat, 27 Sep.
PAE
Seattle
SFO
San Francisco
AU$208 Return, found 1 day ago
AU$208
Return
found 1 day ago
Select Alaska Airlines flight, departing Sat, 20 Sep. from Seattle to San Francisco, returning Sat, 27 Sep., priced at AU$208 found 1 day ago
Hawaiian Airlines
Thu, 4 Sep. - Tue, 9 Sep.
PAE
Seattle
SFO
San Francisco
AU$223 Return, found 1 day ago
AU$223
Return
found 1 day ago
Select Hawaiian Airlines flight, departing Thu, 4 Sep. from Seattle to San Francisco, returning Tue, 9 Sep., priced at AU$223 found 1 day ago
American Airlines
Wed, 3 Sep. - Wed, 10 Sep.
SEA
Seattle
SFO
San Francisco
AU$242 Return, found 1 day ago
AU$242
Return
found 1 day ago
Select American Airlines flight, departing Wed, 3 Sep. from Seattle to San Francisco, returning Wed, 10 Sep., priced at AU$242 found 1 day ago
United
Sat, 16 Aug. - Tue, 19 Aug.
SEA
Seattle
SFO
San Francisco
AU$315 Return, found 19 hours ago
AU$315
Return
found 19 hours ago
Select United flight, departing Sat, 16 Aug. from Seattle to San Francisco, returning Tue, 19 Aug., priced at AU$315 found 19 hours ago

Find the cheapest month to fly from Seattle (SEA) to San Jose (SJC)

September is typically the cheapest month to fly

From AU$103 - AU$225 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.