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

Return flights

03 Dec - 10 Dec	SWISS
01 Dec - 10 Dec	SWISS
05 Dec - 10 Dec	SWISS
16 Dec - 13 Jan	SWISS
15 Dec - 13 Jan	SWISS
02 Dec - 10 Dec	SWISS
15 Dec - 15 Jan	SWISS
13 Dec - 08 Jan	SWISS
01 Dec - 08 Dec	SWISS
05 Dec - 08 Dec	SWISS
04 Dec - 08 Dec	SWISS
06 Dec - 10 Dec	SWISS
09 Dec - 10 Dec	SWISS
04 Dec - 10 Dec	SWISS
17 Dec - 06 Jan	SWISS
16 Dec - 06 Jan	SWISS
29 Dec - 26 Jan	SWISS
30 Dec - 11 Jan	Virgin Atlantic
30 Dec - 06 Jan	Virgin Atlantic
24 Dec - 17 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 375€

Return flights