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

Return flights

30 Dec - 23 Jan	Air Canada
30 Dec - 23 Jan	United	direct
31 Dec - 13 Jan	United	direct
30 Dec - 20 Jan	United
30 Dec - 21 Jan	United
30 Dec - 28 Jan	United	direct
31 Dec - 12 Jan	Lufthansa
31 Dec - 08 Jan	Icelandair
29 Dec - 21 Jan	Air France
05 Dec - 09 Dec	TAP	direct
11 Dec - 15 Dec	Iberia
08 Dec - 14 Jan	TAP
11 Dec - 16 Dec	Iberia
04 Dec - 07 Dec	TAP
08 Dec - 15 Dec	Iberia
08 Dec - 10 Dec	Iberia
04 Dec - 08 Dec	SWISS
08 Dec - 18 Dec	TAP
06 Dec - 13 Dec	Lufthansa
09 Dec - 16 Dec	TAP

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 344€

Return flights