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

Return flights

02 Dec - 09 Dec	SWISS
04 Dec - 09 Dec	SWISS
08 Dec - 13 Dec	Iberia
04 Dec - 11 Dec	SWISS
02 Dec - 08 Dec	Delta
04 Dec - 10 Dec	SWISS
02 Dec - 10 Dec	SWISS
03 Dec - 10 Dec	SWISS
04 Dec - 08 Dec	SWISS
03 Dec - 08 Dec	SWISS
17 Dec - 06 Jan	SWISS
25 Dec - 08 Jan	KLM
30 Dec - 21 Jan	SWISS
31 Dec - 11 Jan	Delta
31 Dec - 07 Jan	SWISS
30 Dec - 07 Jan	SWISS
30 Dec - 06 Jan	SWISS
25 Dec - 01 Jan	Delta
31 Dec - 10 Jan	SWISS
30 Dec - 10 Jan	SWISS

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 $473

Return flights