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

Sunday, December 20th, 2026

7 round-trip options

Returning
Fri, Dec 25, 2026•5 Day Trip
$942 USD
Google Flights
Returning
Sat, Dec 26, 2026•6 Day Trip
$854 USD
Google Flights
Returning
Mon, Dec 28, 2026•8 Day Trip
$850 USD
Google Flights
Returning
Wed, Dec 30, 2026•10 Day Trip
$728 USD
Google Flights
Returning
Thu, Dec 31, 2026•11 Day Trip
$690 USD
Google Flights
Returning
Sat, Jan 2, 2027•13 Day Trip
$782 USD
Google Flights
Returning
Sun, Jan 3, 2027•14 Day Trip
$794 USD
Google Flights