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

Return flights

31 Dec - 24 Jan	Lufthansa
04 Dec - 09 Dec	Lufthansa
02 Dec - 10 Dec	Lufthansa
01 Dec - 08 Dec	Lufthansa
01 Dec - 09 Dec	Lufthansa
04 Dec - 12 Dec	Lufthansa
31 Dec - 08 Jan	Air Canada
10 Dec - 14 Dec	Scandinavian Airlines
06 Dec - 12 Dec	Air Europa
06 Dec - 10 Dec	Air Europa
05 Dec - 10 Dec	Air Europa
09 Dec - 15 Dec	United
30 Dec - 28 Jan	United
31 Dec - 14 Jan	United	direct
31 Dec - 17 Jan	United
29 Dec - 24 Jan	Air Canada
29 Dec - 12 Jan	United	direct
12 Dec - 12 Jan	SWISS
31 Dec - 17 Jan	TAP	direct
15 Dec - 09 Jan	SWISS

Also check the deals for one-way flights from New York to Lisbon 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 New York to Lisbon in December from 326€

Return flights