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 23rd, 2026

7 round-trip options

Returning
Mon, Dec 28, 2026•5 Day Trip
$736 USD
Google Flights
Returning
Tue, Dec 29, 2026•6 Day Trip
$700 USD
Google Flights
Returning
Thu, Dec 31, 2026•8 Day Trip
$698 USD
Google Flights
Returning
Sat, Jan 2, 2027•10 Day Trip
$842 USD
Google Flights
Returning
Sun, Jan 3, 2027•11 Day Trip
$836 USD
Google Flights
Returning
Tue, Jan 5, 2027•13 Day Trip
$771 USD
Google Flights
Returning
Wed, Jan 6, 2027•14 Day Trip
$791 USD
Google Flights