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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 June , July 2026

29 Jun - 16 Jul $ 1,360.00
ONT
Ontario
United Airlines
2 STOPS
OPO
Porto
OPO
Porto
United Airlines
2 STOPS
ONT
Ontario
Pick dates
29 Jun - 21 Jul $ 1,360.00
ONT
Ontario
United Airlines
2 STOPS
OPO
Porto
OPO
Porto
United Airlines
2 STOPS
ONT
Ontario
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29 Jun - 15 Jul $ 1,498.00
ONT
Ontario
United Airlines
2 STOPS
OPO
Porto
OPO
Porto
United Airlines
2 STOPS
ONT
Ontario
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Last minute flights from Ontario to Porto

28 Jun - 01 Jul $ 1,858.00
ONT
Ontario
WestJet
3 STOPS
OPO
Porto
OPO
Porto
WestJet
3 STOPS
ONT
Ontario
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28 Jun - 01 Jul $ 1,897.00
ONT
Ontario
Volaris
3 STOPS
OPO
Porto
OPO
Porto
Volaris
3 STOPS
ONT
Ontario
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28 Jun - 01 Jul $ 1,921.00
ONT
Ontario
Volaris
3 STOPS
OPO
Porto
OPO
Porto
Volaris
3 STOPS
ONT
Ontario
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One-way flights to Porto from Ontario

6:00 AM - 9:40 PM
United Airlines
2 Stops
19h 45m
ONT - OPO
$ 868
Kiwi
Pick dates
6:10 AM - 6:10 PM
United Airlines
2 Stops
16h 5m
ONT - OPO
$ 874
Kiwi
Pick dates
6:00 AM - 6:10 PM
United Airlines
2 Stops
16h 15m
ONT - OPO
$ 874
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)
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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.