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

Return flights

10 Dec - 15 Dec	Iberia For Level
05 Dec - 12 Dec	Iberia For Level
03 Dec - 15 Dec	Iberia For Level
01 Dec - 05 Dec	Iberia For Level
05 Dec - 11 Dec	Iberia For Level
02 Dec - 09 Dec	Air Canada
30 Dec - 24 Jan	Air Canada
07 Dec - 16 Dec	Air Canada
29 Dec - 24 Jan	Air Canada
03 Dec - 08 Dec	Air Canada
31 Dec - 24 Jan	Air Canada
02 Dec - 08 Dec	United
08 Dec - 22 Dec	SWISS
30 Dec - 10 Jan	Air Canada
16 Dec - 10 Jan	TAP	direct
31 Dec - 24 Jan	TAP	direct
15 Dec - 10 Jan	TAP	direct
30 Dec - 10 Jan	TAP	direct
30 Dec - 24 Jan	TAP	direct
31 Dec - 07 Jan	Lufthansa

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 $360

Return flights