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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 March , April 2026

24 Mar - 01 May $ 715.00
ONT
Ontario
United Airlines
2 STOPS
OPO
Porto
OPO
Porto
United Airlines
2 STOPS
ONT
Ontario
Pick dates
24 Mar - 29 Apr $ 809.00
ONT
Ontario
United Airlines
2 STOPS
OPO
Porto
OPO
Porto
United Airlines
2 STOPS
ONT
Ontario
Pick dates
24 Mar - 30 Apr $ 809.00
ONT
Ontario
United Airlines
2 STOPS
OPO
Porto
OPO
Porto
United Airlines
2 STOPS
ONT
Ontario
Pick dates

Last minute flights from Ontario to Porto

24 Mar - 31 Mar $ 1,367.00
ONT
Ontario
Alaska Airlines
3 STOPS
OPO
Porto
OPO
Porto
Alaska Airlines
3 STOPS
ONT
Ontario
Pick dates
24 Mar - 01 Apr $ 1,396.00
ONT
Ontario
Frontier Airlines
3 STOPS
OPO
Porto
OPO
Porto
Frontier Airlines
2 STOPS
ONT
Ontario
Pick dates
23 Mar - 31 Mar $ 1,403.00
ONT
Ontario
Alaska Airlines
3 STOPS
OPO
Porto
OPO
Porto
Alaska Airlines
3 STOPS
ONT
Ontario
Pick dates

One-way flights to Porto from Ontario

6:00 AM - 3:00 PM
Air Europa
3 Stops
26h 15m
ONT - OPO
$ 490
Kiwi
Pick dates
11:59 PM - 10:45 PM
United Airlines
2 Stops
26h 31m
ONT - OPO
$ 968
Kiwi
Pick dates
8:00 AM - 9:45 PM
United Airlines
2 Stops
17h 30m
ONT - OPO
$ 1,069
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.