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 14 hours ago
Limited Availability
16% of dates checked are available within 10% of the lowest price

Wednesday, December 16th, 2026

7 round-trip options

Returning
Mon, Dec 21, 2026•5 Day Trip
$994 USD
Google Flights
Returning
Tue, Dec 22, 2026•6 Day Trip
$935 USD
Google Flights
Returning
Thu, Dec 24, 2026•8 Day Trip
$766 USD
Google Flights
Returning
Sat, Dec 26, 2026•10 Day Trip
$766 USD
Google Flights
Returning
Sun, Dec 27, 2026•11 Day Trip
$694 USD
Google Flights
Returning
Tue, Dec 29, 2026•13 Day Trip
$694 USD
Google Flights
Returning
Wed, Dec 30, 2026•14 Day Trip
$733 USD
Google Flights