Earn point on your loyalty program!arrow arc left

Cheap flights from Portland (PDX) 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 Portland (PDX) to Porto (OPO)

How to find the cheapest flight from Portland (PDX) 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 Portland (PDX) 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 Portland (PDX) 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 Portland to Porto in April , May 2026

30 Apr - 07 May $ 848.00
PDX
Portland
KLM Royal Dutch Airlines
2 STOPS
OPO
Porto
OPO
Porto
KLM Royal Dutch Airlines
2 STOPS
PDX
Portland
Pick dates
17 Apr - 07 May $ 1,837.00
PDX
Portland
Swiss International Air Lines
2 STOPS
OPO
Porto
OPO
Porto
Swiss International Air Lines
2 STOPS
PDX
Portland
Pick dates
17 Apr - 05 May $ 1,853.00
PDX
Portland
Swiss International Air Lines
2 STOPS
OPO
Porto
OPO
Porto
Swiss International Air Lines
2 STOPS
PDX
Portland
Pick dates

Last minute flights from Portland to Porto

16 Apr - 30 Apr $ 1,008.00
PDX
Portland
United Airlines
2 STOPS
OPO
Porto
OPO
Porto
United Airlines
2 STOPS
PDX
Portland
Pick dates
16 Apr - 30 Apr $ 1,017.00
PDX
Portland
United Airlines
2 STOPS
OPO
Porto
OPO
Porto
United Airlines
1 STOPS
PDX
Portland
Pick dates
16 Apr - 30 Apr $ 1,017.00
PDX
Portland
United Airlines
2 STOPS
OPO
Porto
OPO
Porto
United Airlines
1 STOPS
PDX
Portland
Pick dates

One-way flights to Porto from Portland

1:05 PM - 3:15 PM
Norwegian Air Sweden
2 Stops
21h 25m
PDX - OPO
$ 329
Kiwi
Pick dates
8:05 AM - 9:45 PM
United Airlines
2 Stops
17h 40m
PDX - OPO
$ 679
Kiwi
Pick dates
7:00 AM - 9:45 PM
United Airlines
2 Stops
18h 45m
PDX - OPO
$ 679
Kiwi
Pick dates

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