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

Saturday, December 19th, 2026

7 round-trip options

Returning
Thu, Dec 24, 2026•5 Day Trip
$867 USD
Google Flights
Returning
Fri, Dec 25, 2026•6 Day Trip
$867 USD
Google Flights
Returning
Sun, Dec 27, 2026•8 Day Trip
$863 USD
Google Flights
Returning
Tue, Dec 29, 2026•10 Day Trip
$808 USD
Google Flights
Returning
Wed, Dec 30, 2026•11 Day Trip
$824 USD
Google Flights
Returning
Fri, Jan 1, 2027•13 Day Trip
$834 USD
Google Flights
Returning
Sat, Jan 2, 2027•14 Day Trip
$845 USD
Google Flights