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 July , August 2026

28 Jul - 18 Aug $ 1,066.00
SFO
San Francisco
United Airlines
1 STOPS
OPO
Porto
OPO
Porto
United Airlines
1 STOPS
SFO
San Francisco
Pick dates
29 Jul - 11 Aug $ 1,452.00
SFO
San Francisco
Swiss International Air Lines
1 STOPS
OPO
Porto
OPO
Porto
Swiss International Air Lines
1 STOPS
SFO
San Francisco
Pick dates
29 Jul - 06 Aug $ 1,480.00
SFO
San Francisco
Lufthansa
1 STOPS
OPO
Porto
OPO
Porto
Lufthansa
1 STOPS
SFO
San Francisco
Pick dates

Last minute flights from San Francisco to Porto

29 Jul - 31 Jul $ 1,430.00
SFO
San Francisco
Swiss International Air Lines
1 STOPS
OPO
Porto
OPO
Porto
Swiss International Air Lines
1 STOPS
SFO
San Francisco
Pick dates
27 Jul - 31 Jul $ 1,430.00
SFO
San Francisco
Swiss International Air Lines
1 STOPS
OPO
Porto
OPO
Porto
Swiss International Air Lines
1 STOPS
SFO
San Francisco
Pick dates
29 Jul - 31 Jul $ 1,889.00
SFO
San Francisco
KLM Royal Dutch Airlines
1 STOPS
OPO
Porto
OPO
Porto
KLM Royal Dutch Airlines
1 STOPS
SFO
San Francisco
Pick dates

One-way flights to Porto from San Francisco

4:35 PM - 2:00 PM
TAP Portugal
1 Stops
14h 25m
SFO - OPO
$ 493
Kiwi
Pick dates
4:35 PM - 6:00 PM
TAP Portugal
1 Stops
18h 25m
SFO - OPO
$ 493
Kiwi
Pick dates
8:15 AM - 6:10 PM
United Airlines
1 Stops
14h
SFO - OPO
$ 641
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.