Porto (OPO) to San Francisco (SFO) flight deal in economy from $669

Air CanadaACAir CanadaLufthansaLHLufthansaSwiss International Air LinesLXSwiss International Air LinesAustrian AirlinesOSAustrian AirlinesUnited AirlinesUAUnited Airlines
Round Trip•Economy
PortugalOPO

Francisco Sá Carneiro Airport

Porto, Portugal
United StatesSFO

San Francisco International Airport

San Francisco, United States
$871 USD
-23%$669 USD
Verified about 7 hours ago
Limited Availability
16% of dates checked are available within 10% of the lowest price

Saturday, September 5th, 2026

9 round-trip options

Returning
Thu, Sep 10, 2026•5 Day Trip
$928 USD
Google Flights
Returning
Fri, Sep 11, 2026•6 Day Trip
$878 USD
Google Flights
Returning
Sat, Sep 12, 2026•7 Day Trip
$863 USD
Google Flights
Returning
Sun, Sep 13, 2026•8 Day Trip
$852 USD
Google Flights
Returning
Mon, Sep 14, 2026•9 Day Trip
$863 USD
Google Flights
Returning
Tue, Sep 15, 2026•10 Day Trip
$863 USD
Google Flights
Returning
Wed, Sep 16, 2026•11 Day Trip
$863 USD
Google Flights
Returning
Thu, Sep 17, 2026•12 Day Trip
$1,033 USD
Google Flights
Returning
Fri, Sep 18, 2026•13 Day Trip
$867 USD
Google Flights