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

Return flights

09 Dec - 13 Jan	SWISS
06 Dec - 10 Dec	SWISS
04 Dec - 10 Dec	SWISS
03 Dec - 10 Dec	SWISS
02 Dec - 09 Dec	SWISS
05 Dec - 09 Dec	SWISS
09 Dec - 16 Dec	Iberia
01 Dec - 08 Dec	SWISS
03 Dec - 11 Dec	Virgin Atlantic
04 Dec - 11 Dec	Virgin Atlantic
03 Dec - 09 Dec	Delta
09 Dec - 09 Jan	KLM
09 Dec - 07 Jan	Delta
16 Dec - 20 Jan	KLM
11 Dec - 12 Jan	KLM
15 Dec - 14 Jan	KLM
24 Dec - 09 Jan	Delta
13 Dec - 07 Jan	Delta
16 Dec - 08 Jan	Delta
13 Dec - 08 Jan	Delta

Also check the deals for one-way flights from London to New York 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 London to New York in December from $477

Return flights