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
03 Dec - 08 Dec	Ryanair
06 Dec - 12 Dec	TAP	direct
11 Dec - 20 Jan	Delta
05 Dec - 09 Dec	KLM
04 Dec - 09 Dec	Delta
17 Dec - 07 Jan	Delta
05 Dec - 12 Dec	TAP
01 Dec - 04 Dec	Scandinavian Airlines
06 Dec - 08 Dec	TAP
07 Dec - 12 Dec	TAP
05 Dec - 10 Dec	KLM
25 Dec - 08 Jan	KLM
24 Dec - 08 Jan	United
31 Dec - 14 Jan	TAP	direct
16 Dec - 05 Jan	Lufthansa
22 Dec - 06 Jan	Delta
31 Dec - 07 Jan	TAP
19 Dec - 07 Jan	Lufthansa
29 Dec - 07 Jan	United

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 366€

Return flights