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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 October , November 2026

30 Oct - 09 Nov $ 1,063.00
ONT
Ontario
Frontier Airlines
2 STOPS
OPO
Porto
OPO
Porto
Frontier Airlines
2 STOPS
ONT
Ontario
Pick dates
24 Oct - 22 Nov $ 1,076.00
ONT
Ontario
Frontier Airlines
3 STOPS
OPO
Porto
OPO
Porto
Frontier Airlines
2 STOPS
ONT
Ontario
Pick dates
30 Oct - 09 Nov $ 1,146.00
ONT
Ontario
Frontier Airlines
2 STOPS
OPO
Porto
OPO
Porto
Frontier Airlines
2 STOPS
ONT
Ontario
Pick dates

Last minute flights from Ontario to Porto

24 Oct - 02 Nov $ 1,135.00
ONT
Ontario
Frontier Airlines
3 STOPS
OPO
Porto
OPO
Porto
Frontier Airlines
3 STOPS
ONT
Ontario
Pick dates
24 Oct - 01 Nov $ 1,234.00
ONT
Ontario
Frontier Airlines
3 STOPS
OPO
Porto
OPO
Porto
Frontier Airlines
3 STOPS
ONT
Ontario
Pick dates
24 Oct - 01 Nov $ 1,255.00
ONT
Ontario
Frontier Airlines
3 STOPS
OPO
Porto
OPO
Porto
Frontier Airlines
3 STOPS
ONT
Ontario
Pick dates

One-way flights to Porto from Ontario

9:25 AM - 9:50 PM
United Airlines
2 Stops
16h 20m
ONT - OPO
$ 497
Kiwi
Pick dates
9:25 AM - 10:45 PM
United Airlines
2 Stops
17h 5m
ONT - OPO
$ 497
Kiwi
Pick dates
9:25 AM - 10:45 PM
United Airlines
2 Stops
17h 5m
ONT - OPO
$ 497
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.