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

Return flights

02 Dec - 09 Dec	Air Canada
03 Dec - 07 Dec	Air Canada
11 Dec - 18 Dec	Air Canada
01 Dec - 10 Dec	Air Canada
03 Dec - 09 Dec	United
30 Dec - 24 Jan	United
06 Dec - 14 Dec	Air France
31 Dec - 24 Jan	United
01 Dec - 09 Dec	Air Canada
05 Dec - 07 Dec	United
05 Dec - 08 Dec	United
11 Dec - 15 Dec	United
08 Dec - 25 Jan	United
31 Dec - 08 Jan	Air Canada
29 Dec - 24 Jan	United
28 Dec - 19 Jan	Air Canada
16 Dec - 12 Jan	United
17 Dec - 14 Jan	United
27 Dec - 19 Jan	Air Canada
13 Dec - 11 Jan	Air Canada

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 324€

Return flights