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

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How to find the cheapest flight from Ontario (ONT) to Porto (OPO)

How to find the cheapest flight from Ontario (ONT) to Porto (OPO)
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How to find the cheapest flight from Ontario (ONT) to Porto (OPO)
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How to find the cheapest flight from Ontario (ONT) to Porto (OPO)
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Cheap flights from Ontario to Porto in April , May 2026

26 Apr - 05 May $ 1,049.00
ONT
Ontario
Frontier Airlines
2 STOPS
OPO
Porto
OPO
Porto
Frontier Airlines
2 STOPS
ONT
Ontario
Pick dates
30 Apr - 05 May $ 1,053.00
ONT
Ontario
Frontier Airlines
3 STOPS
OPO
Porto
OPO
Porto
Frontier Airlines
2 STOPS
ONT
Ontario
Pick dates
30 Apr - 05 May $ 1,055.00
ONT
Ontario
Frontier Airlines
3 STOPS
OPO
Porto
OPO
Porto
Frontier Airlines
2 STOPS
ONT
Ontario
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Last minute flights from Ontario to Porto

18 Apr - 30 Apr $ 965.00
ONT
Ontario
United Airlines
2 STOPS
OPO
Porto
OPO
Porto
United Airlines
2 STOPS
ONT
Ontario
Pick dates
18 Apr - 01 May $ 965.00
ONT
Ontario
United Airlines
2 STOPS
OPO
Porto
OPO
Porto
United Airlines
2 STOPS
ONT
Ontario
Pick dates
18 Apr - 30 Apr $ 1,067.00
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

9:10 AM - 8:25 PM
Vueling
2 Stops
28h 10m
ONT - OPO
$ 570
Kiwi
Pick dates
10:49 AM - 9:45 PM
United Airlines
2 Stops
38h 56m
ONT - OPO
$ 681
Kiwi
Pick dates
7:00 AM - 9:45 PM
United Airlines
2 Stops
18h 45m
ONT - OPO
$ 716
Kiwi
Pick dates

How to find the cheapest flight from Ontario (ONT) to Porto (OPO)

Related info for your journey
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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.