Cheap flights from Porto to Silicon Valley

View AU$818 flight on Tue, 30 Sep. 2025Opens in a new window

Popular airlines from Porto 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 Porto (OPO) 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.

United
Mon, 8 Sep. - Tue, 16 Sep.
OPO
Porto
SFO
San Francisco
AU$1,181 Return, found 3 days ago
AU$1,181
Return
found 3 days ago
Select United flight, departing Mon, 8 Sep. from Porto to San Francisco, returning Tue, 16 Sep., priced at AU$1,181 found 3 days ago
Delta
Mon, 8 Sep. - Tue, 16 Sep.
OPO
Porto
SFO
San Francisco
AU$1,200 Return, found 3 days ago
AU$1,200
Return
found 3 days ago
Select Delta flight, departing Mon, 8 Sep. from Porto to San Francisco, returning Tue, 16 Sep., priced at AU$1,200 found 3 days ago
American Airlines
Mon, 8 Sep. - Tue, 16 Sep.
OPO
Porto
SFO
San Francisco
AU$1,207 Return, found 3 days ago
AU$1,207
Return
found 3 days ago
Select American Airlines flight, departing Mon, 8 Sep. from Porto to San Francisco, returning Tue, 16 Sep., priced at AU$1,207 found 3 days ago
Swiss International Air Lines
Mon, 8 Sep. - Tue, 16 Sep.
OPO
Porto
SFO
San Francisco
AU$1,224 Return, found 3 days ago
AU$1,224
Return
found 3 days ago
Select Swiss International Air Lines flight, departing Mon, 8 Sep. from Porto to San Francisco, returning Tue, 16 Sep., priced at AU$1,224 found 3 days ago
Lufthansa
Mon, 8 Sep. - Tue, 16 Sep.
OPO
Porto
SFO
San Francisco
AU$1,278 Return, found 3 days ago
AU$1,278
Return
found 3 days ago
Select Lufthansa flight, departing Mon, 8 Sep. from Porto to San Francisco, returning Tue, 16 Sep., priced at AU$1,278 found 3 days ago
Brussels Airlines
Mon, 8 Sep. - Tue, 16 Sep.
OPO
Porto
SFO
San Francisco
AU$1,286 Return, found 3 days ago
AU$1,286
Return
found 3 days ago
Select Brussels Airlines flight, departing Mon, 8 Sep. from Porto to San Francisco, returning Tue, 16 Sep., priced at AU$1,286 found 3 days ago
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