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

Return flights

01 Dec - 31 Jan	Air Canada
08 Dec - 15 Dec	United
11 Dec - 16 Dec	KLM
07 Dec - 18 Dec	KLM
05 Dec - 07 Dec	KLM
08 Dec - 14 Jan	Air Canada
07 Dec - 14 Dec	Delta
02 Dec - 27 Dec	Air Canada
03 Dec - 10 Dec	Lufthansa
03 Dec - 27 Dec	Lufthansa
05 Dec - 27 Dec	Air Canada
01 Dec - 27 Dec	Air Canada
31 Dec - 09 Jan	Air Canada
16 Dec - 12 Jan	Air Canada
15 Dec - 15 Jan	Air Canada
31 Dec - 10 Jan	Lufthansa
31 Dec - 12 Jan	British Airways
29 Dec - 10 Jan	Lufthansa
30 Dec - 11 Jan	British Airways
15 Dec - 09 Jan	Air Canada

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 $405

Return flights