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

Return flights

10 Dec - 26 Jan	ITA Airways
10 Dec - 13 Jan	KLM
09 Dec - 29 Jan	ITA Airways
10 Dec - 14 Jan	SWISS
09 Dec - 20 Jan	Lufthansa
11 Dec - 22 Jan	ITA Airways
03 Dec - 08 Dec	SWISS
03 Dec - 09 Dec	Lufthansa
09 Dec - 27 Jan	ITA Airways
01 Dec - 09 Dec	SWISS
02 Dec - 09 Dec	SWISS
01 Dec - 08 Dec	SWISS
01 Dec - 13 Jan	SWISS
02 Dec - 13 Jan	SWISS
03 Dec - 11 Dec	SWISS
04 Dec - 09 Dec	KLM
09 Dec - 18 Jan	ITA Airways
10 Dec - 15 Dec	Iberia
02 Dec - 14 Dec	SWISS
03 Dec - 10 Dec	Virgin Atlantic

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 479€

Return flights