Earn point on your loyalty program!arrow arc left

Cheap flights from San Francisco (SFO) to Porto (OPO)

Know your dates, get live prices in seconds
airplane logo

pin logo

calendar
Departure
calendar backward
Return
airplane logo
1 Adults (11+)
0 Children (2~11)
0 Infants (0~2)
Save up to 31%
Book Flight + Hotel at the same time

How to find the cheapest flight from San Francisco (SFO) to Porto (OPO)

How to find the cheapest flight from San Francisco (SFO) to Porto (OPO)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from San Francisco (SFO) to Porto (OPO)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from San Francisco (SFO) to Porto (OPO)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.

Cheap flights from San Francisco to Porto in May , June 2026

31 May - 11 Jun $ 1,175.00
SFO
San Francisco
United Airlines
1 STOPS
OPO
Porto
OPO
Porto
United Airlines
1 STOPS
SFO
San Francisco
Pick dates
26 May - 10 Jun $ 1,688.00
SFO
San Francisco
TAP Portugal
1 STOPS
OPO
Porto
OPO
Porto
TAP Portugal
1 STOPS
SFO
San Francisco
Pick dates
25 May - 06 Jun $ 2,694.00
SFO
San Francisco
KLM Royal Dutch Airlines
1 STOPS
OPO
Porto
OPO
Porto
KLM Royal Dutch Airlines
1 STOPS
SFO
San Francisco
Pick dates

Last minute flights from San Francisco to Porto

24 May - 31 May $ 1,304.00
SFO
San Francisco
United Airlines
1 STOPS
OPO
Porto
OPO
Porto
United Airlines
1 STOPS
SFO
San Francisco
Pick dates
24 May - 31 May $ 1,304.00
SFO
San Francisco
United Airlines
1 STOPS
OPO
Porto
OPO
Porto
United Airlines
1 STOPS
SFO
San Francisco
Pick dates
25 May - 31 May $ 3,942.00
SFO
San Francisco
Air Europa
1 STOPS
OPO
Porto
OPO
Porto
Air Europa
2 STOPS
SFO
San Francisco
Pick dates

One-way flights to Porto from San Francisco

7:40 AM - 3:45 PM
Norwegian Air Shuttle
3 Stops
26h 50m
SFO - OPO
$ 557
Kiwi
Pick dates
2:40 PM - 1:50 PM
United Airlines
1 Stops
17h
SFO - OPO
$ 731
Kiwi
Pick dates
8:15 AM - 6:10 PM
United Airlines
1 Stops
14h
SFO - OPO
$ 871
Kiwi
Pick dates

How to find the cheapest flight from San Francisco (SFO) to Porto (OPO)

Related info for your journey
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from San Francisco (SFO) to Porto (OPO)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from San Francisco (SFO) to Porto (OPO)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.