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

Return flights

01 Dec - 10 Dec	Air Canada
03 Dec - 13 Dec	Air Europa
03 Dec - 09 Dec	Air Europa
03 Dec - 10 Dec	Air Europa
03 Dec - 10 Dec	Air France	direct
04 Dec - 25 Dec	Air France	direct
01 Dec - 10 Dec	Delta	direct
08 Dec - 14 Jan	Air France	direct
28 Dec - 16 Jan	Delta
07 Dec - 16 Dec	Air Canada
05 Dec - 13 Dec	Air Canada
31 Dec - 08 Jan	Air Canada
30 Dec - 24 Jan	Air Canada
31 Dec - 24 Jan	United
01 Dec - 07 Dec	Air France
15 Dec - 09 Jan	Air France	direct
15 Dec - 10 Jan	Air France	direct
07 Dec - 13 Jan	SWISS
16 Dec - 12 Jan	Delta
16 Dec - 10 Jan	KLM

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 331€

Return flights