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

Return flights

03 Dec - 09 Dec	Air Canada
03 Dec - 10 Dec	Air Canada
11 Dec - 23 Dec	Air Canada
07 Dec - 27 Dec	Air Canada
05 Dec - 08 Dec	United
01 Dec - 08 Dec	Air Canada
06 Dec - 27 Dec	Lufthansa
01 Dec - 27 Dec	Air Canada
25 Dec - 31 Dec	Air Canada
16 Dec - 23 Dec	Delta
31 Dec - 07 Jan	United
11 Dec - 07 Jan	United
26 Dec - 15 Jan	Air Canada
24 Dec - 17 Jan	United
22 Dec - 17 Jan	Air Canada
18 Dec - 06 Jan	Air Canada
01 Dec - 03 Jan	United
30 Dec - 04 Jan	Air Canada
20 Dec - 10 Jan	Porter Airlines (Canada) Ltd
31 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 $402

Return flights