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

Return flights

10 Dec - 21 Jan	SWISS
08 Dec - 14 Jan	SWISS
16 Dec - 13 Jan	SWISS
02 Dec - 09 Dec	SWISS
04 Dec - 11 Dec	SWISS
02 Dec - 07 Dec	SWISS
16 Dec - 19 Jan	ITA Airways
11 Dec - 15 Dec	Iberia
08 Dec - 14 Dec	SWISS
03 Dec - 08 Dec	SWISS
03 Dec - 07 Dec	Delta
04 Dec - 09 Dec	Delta
05 Dec - 10 Dec	SWISS
09 Dec - 15 Dec	British Airways
15 Dec - 12 Jan	SWISS
08 Dec - 08 Jan	KLM
10 Dec - 07 Jan	KLM
16 Dec - 16 Jan	ITA Airways
16 Dec - 08 Jan	SWISS
13 Dec - 11 Jan	ITA Airways

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 $577

Return flights