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

Return flights

05 Dec - 14 Dec	TAP
08 Dec - 15 Dec	TAP
05 Dec - 14 Dec	TAP	direct
26 Dec - 09 Jan	TAP
22 Dec - 28 Dec	TAP
20 Dec - 26 Dec	TAP	direct
20 Dec - 28 Dec	TAP
19 Dec - 28 Dec	TAP
19 Dec - 27 Dec	TAP
20 Dec - 28 Dec	TAP	direct
16 Dec - 03 Jan	TAP	direct
19 Dec - 05 Jan	TAP
19 Dec - 27 Dec	TAP	direct

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

Book a cheap hotel in Porto

Cheap car rent in Porto

Cheapest return flights from Newark to Porto in December from $479

Return flights