Earn point on your loyalty program!arrow arc left

Cheap flights from Ontario (ONT) 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 Ontario (ONT) to Porto (OPO)

How to find the cheapest flight from Ontario (ONT) 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 Ontario (ONT) 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 Ontario (ONT) 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 Ontario to Porto in May , June 2026

26 May - 02 Jun $ 1,201.00
ONT
Ontario
United Airlines
2 STOPS
OPO
Porto
OPO
Porto
United Airlines
2 STOPS
ONT
Ontario
Pick dates
24 May - 06 Jun $ 1,991.00
ONT
Ontario
Turkish Airlines
2 STOPS
OPO
Porto
OPO
Porto
Turkish Airlines
2 STOPS
ONT
Ontario
Pick dates
24 May - 03 Jun $ 2,410.00
ONT
Ontario
Turkish Airlines
2 STOPS
OPO
Porto
OPO
Porto
Turkish Airlines
2 STOPS
ONT
Ontario
Pick dates

Last minute flights from Ontario to Porto

28 May - 01 Jun $ 1,452.00
ONT
Ontario
Frontier Airlines
3 STOPS
OPO
Porto
OPO
Porto
Frontier Airlines
3 STOPS
ONT
Ontario
Pick dates
24 May - 01 Jun $ 1,978.00
ONT
Ontario
United Airlines
2 STOPS
OPO
Porto
OPO
Porto
United Airlines
2 STOPS
ONT
Ontario
Pick dates
24 May - 31 May $ 3,832.00
ONT
Ontario
United Airlines
2 STOPS
OPO
Porto
OPO
Porto
United Airlines
2 STOPS
ONT
Ontario
Pick dates

One-way flights to Porto from Ontario

7:00 AM - 4:40 PM
Norwegian Air Sweden
3 Stops
28h 10m
ONT - OPO
$ 684
Kiwi
Pick dates
6:30 AM - 6:50 PM
United Airlines
2 Stops
16h 25m
ONT - OPO
$ 870
Kiwi
Pick dates
6:00 AM - 6:10 PM
United Airlines
2 Stops
16h 15m
ONT - OPO
$ 973
Kiwi
Pick dates

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