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

Return flights

03 Dec - 08 Dec	Air Canada
01 Dec - 05 Dec	Iberia For Level
02 Dec - 18 Dec	SWISS
04 Dec - 11 Dec	Iberia For Level
31 Dec - 13 Jan	Air Canada
02 Dec - 18 Dec	Virgin Atlantic	direct
02 Dec - 10 Dec	Delta	direct
05 Dec - 12 Dec	TAP	direct
31 Dec - 13 Jan	TAP	direct
31 Dec - 14 Jan	TAP	direct
04 Dec - 12 Dec	SWISS
02 Dec - 14 Dec	SWISS
15 Dec - 23 Dec	Air France	direct
30 Dec - 06 Jan	Air Canada
30 Dec - 07 Jan	Air Canada
31 Dec - 06 Jan	British Airways
25 Dec - 01 Jan	British Airways
22 Dec - 16 Jan	Delta
24 Dec - 06 Jan	British Airways
24 Dec - 07 Jan	British Airways

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 $402

Return flights