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

Return flights

01 Dec - 04 Dec	Scandinavian Airlines
01 Dec - 11 Dec	Scandinavian Airlines
05 Dec - 11 Dec	Scandinavian Airlines
01 Dec - 07 Dec	Scandinavian Airlines
05 Dec - 07 Dec	Scandinavian Airlines
03 Dec - 08 Dec	TAP	direct
03 Dec - 11 Dec	TAP	direct
03 Dec - 10 Dec	TAP	direct
04 Dec - 08 Dec	SWISS
02 Dec - 07 Dec	SWISS
15 Dec - 14 Jan	United
31 Dec - 05 Jan	Lufthansa
27 Dec - 05 Jan	Lufthansa
30 Dec - 07 Jan	SWISS
29 Dec - 07 Jan	SWISS
27 Dec - 01 Jan	United
28 Dec - 07 Jan	Lufthansa
29 Dec - 05 Jan	SWISS
26 Dec - 05 Jan	SWISS
16 Dec - 02 Jan	Delta

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 344€

Return flights