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

Return flights

07 Dec - 15 Dec	Scandinavian Airlines
15 Dec - 15 Jan	Scandinavian Airlines
10 Dec - 15 Dec	Scandinavian Airlines
01 Dec - 08 Dec	Scandinavian Airlines
07 Dec - 14 Dec	Scandinavian Airlines
04 Dec - 11 Dec	TAP
04 Dec - 11 Dec	TAP	direct
04 Dec - 08 Dec	TAP	direct
04 Dec - 09 Dec	TAP	direct
08 Dec - 15 Dec	TAP	direct
10 Dec - 30 Dec	Scandinavian Airlines
30 Dec - 09 Jan	Lufthansa
23 Dec - 05 Jan	United
29 Dec - 05 Jan	United
24 Dec - 06 Jan	Lufthansa
29 Dec - 06 Jan	Lufthansa
30 Dec - 06 Jan	Lufthansa
19 Dec - 04 Jan	TAP
24 Dec - 04 Jan	Delta
25 Dec - 03 Jan	Air Canada

Also check the deals for one-way flights from Lisbon 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 Lisbon to Newark in December from $446

Return flights