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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 November , December 2025

27 Nov - 11 Dec $ 988.00
ONT
Ontario
Frontier Airlines
2 STOPS
OPO
Porto
OPO
Porto
Frontier Airlines
3 STOPS
ONT
Ontario
Pick dates
27 Nov - 12 Dec $ 1,097.00
ONT
Ontario
Frontier Airlines
2 STOPS
OPO
Porto
OPO
Porto
Frontier Airlines
2 STOPS
ONT
Ontario
Pick dates
29 Nov - 12 Dec $ 1,164.00
ONT
Ontario
Frontier Airlines
3 STOPS
OPO
Porto
OPO
Porto
Frontier Airlines
2 STOPS
ONT
Ontario
Pick dates

Last minute flights from Ontario to Porto

27 Nov - 02 Dec $ 1,341.00
ONT
Ontario
Frontier Airlines
2 STOPS
OPO
Porto
OPO
Porto
Frontier Airlines
3 STOPS
ONT
Ontario
Pick dates
27 Nov - 02 Dec $ 1,399.00
ONT
Ontario
Frontier Airlines
2 STOPS
OPO
Porto
OPO
Porto
Frontier Airlines
3 STOPS
ONT
Ontario
Pick dates
29 Nov - 02 Dec $ 1,403.00
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

3:31 PM - 7:10 PM
Air Transat
2 Stops
31h 34m
ONT - OPO
$ 553
Kiwi
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6:05 AM - 9:45 PM
United Airlines
2 Stops
19h 25m
ONT - OPO
$ 963
Kiwi
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1:29 PM - 1:00 PM
United Airlines
2 Stops
17h 16m
ONT - OPO
$ 1,067
Kiwi
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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.