AirHint found the following cheapest return flights from Porto (OPO) to Newark (EWR) in December 2025 (see full year).

Return flights

05 Dec - 11 Dec	Scandinavian Airlines
01 Dec - 11 Dec	Scandinavian Airlines
05 Dec - 14 Dec	Scandinavian Airlines
01 Dec - 07 Dec	Scandinavian Airlines
15 Dec - 07 Jan	Lufthansa
16 Dec - 07 Jan	Lufthansa
02 Dec - 08 Dec	Lufthansa
02 Dec - 09 Dec	United
03 Dec - 07 Dec	SWISS
05 Dec - 10 Dec	SWISS
06 Dec - 10 Dec	SWISS
02 Dec - 07 Dec	SWISS
17 Dec - 07 Jan	United
18 Dec - 09 Jan	Delta
18 Dec - 07 Jan	Delta
25 Dec - 08 Jan	KLM
31 Dec - 10 Jan	TAP	direct
24 Dec - 01 Jan	TAP	direct
26 Dec - 01 Jan	TAP	direct
27 Dec - 01 Jan	TAP	direct

Also check the deals for one-way flights from Porto to Newark in December.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Porto to Newark in December from $405

Return flights