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

Return flights

02 Dec - 18 Dec	Air Canada
31 Dec - 13 Jan	United
02 Dec - 14 Dec	Air Canada
02 Dec - 10 Dec	Air Canada
05 Dec - 14 Dec	United
13 Dec - 25 Dec	Air France
07 Dec - 27 Dec	KLM
06 Dec - 27 Dec	Lufthansa
03 Dec - 27 Dec	United
13 Dec - 29 Dec	Air France
13 Dec - 27 Dec	Air France
29 Dec - 24 Jan	Lufthansa
31 Dec - 06 Jan	United
24 Dec - 17 Jan	United
23 Dec - 17 Jan	Air Canada
26 Dec - 08 Jan	Air Canada
27 Dec - 05 Jan	Air Canada
17 Dec - 10 Jan	Air Canada
20 Dec - 24 Jan	Lufthansa
11 Dec - 04 Jan	United

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 349€

Return flights