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

Return flights

28 Dec - 18 Jan	Air Canada
25 Dec - 28 Dec	United
26 Dec - 29 Dec	United
24 Dec - 28 Dec	United
25 Dec - 31 Dec	United
25 Dec - 30 Dec	United
23 Dec - 17 Jan	United
29 Dec - 08 Jan	Air Canada
23 Dec - 28 Dec	United
24 Dec - 31 Dec	United
27 Dec - 30 Dec	Air France
22 Dec - 28 Dec	United
25 Dec - 01 Jan	United
24 Dec - 30 Dec	United
25 Dec - 02 Jan	Spirit Airlines
23 Dec - 01 Jan	United
31 Dec - 05 Jan	Porter Airlines (Canada) Ltd
23 Dec - 02 Jan	Air Transat
28 Dec - 04 Jan	Porter Airlines (Canada) Ltd
24 Dec - 02 Jan	Air Transat

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 685€

Return flights