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

Return flights

24 Dec - 01 Jan	Lufthansa
24 Dec - 31 Jan	TAP
19 Dec - 11 Jan	United	direct
19 Dec - 12 Jan	United	direct
19 Dec - 18 Jan	United	direct
20 Dec - 01 Jan	United	direct
25 Dec - 01 Jan	United	direct
23 Dec - 31 Dec	United
24 Dec - 31 Dec	United
25 Dec - 31 Dec	United	direct
26 Dec - 31 Dec	United
22 Dec - 31 Dec	United	direct
23 Dec - 01 Jan	United	direct
26 Dec - 11 Jan	United	direct
26 Dec - 29 Jan	United	direct
27 Dec - 31 Dec	United
26 Dec - 31 Dec	Brussels Airlines	direct
24 Dec - 31 Dec	Brussels Airlines	direct
23 Dec - 31 Dec	Brussels Airlines	direct
15 Dec - 29 Dec	Delta

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 $573

Return flights