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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 2026

25 Nov - 07 Dec $ 1,079.00
ONT
Ontario
Frontier Airlines
3 STOPS
OPO
Porto
OPO
Porto
Frontier Airlines
2 STOPS
ONT
Ontario
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25 Nov - 12 Dec $ 1,082.00
ONT
Ontario
Frontier Airlines
3 STOPS
OPO
Porto
OPO
Porto
Frontier Airlines
2 STOPS
ONT
Ontario
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25 Nov - 09 Dec $ 1,088.00
ONT
Ontario
Alaska Airlines
3 STOPS
OPO
Porto
OPO
Porto
Alaska Airlines
3 STOPS
ONT
Ontario
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Last minute flights from Ontario to Porto

25 Nov - 02 Dec $ 1,085.00
ONT
Ontario
Frontier Airlines
3 STOPS
OPO
Porto
OPO
Porto
Frontier Airlines
3 STOPS
ONT
Ontario
Pick dates
25 Nov - 02 Dec $ 1,088.00
ONT
Ontario
Frontier Airlines
3 STOPS
OPO
Porto
OPO
Porto
Frontier Airlines
3 STOPS
ONT
Ontario
Pick dates
27 Nov - 02 Dec $ 1,128.00
ONT
Ontario
Frontier Airlines
3 STOPS
OPO
Porto
OPO
Porto
Frontier Airlines
3 STOPS
ONT
Ontario
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One-way flights to Porto from Ontario

10:55 AM - 9:00 PM
TAP Portugal
3 Stops
27h 5m
ONT - OPO
$ 514
Kiwi
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10:55 AM - 2:00 PM
TAP Portugal
3 Stops
20h 5m
ONT - OPO
$ 517
Kiwi
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10:55 AM - 4:00 PM
TAP Portugal
3 Stops
22h 5m
ONT - OPO
$ 557
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)
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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.