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

Return flights

03 Dec - 06 Dec	Austrian Airlines
03 Dec - 07 Dec	Austrian Airlines
05 Dec - 12 Dec	Air Canada
04 Dec - 11 Dec	Air Canada
07 Dec - 10 Dec	Aer Lingus
05 Dec - 10 Dec	Aer Lingus
06 Dec - 07 Dec	SWISS
05 Dec - 09 Dec	SWISS
02 Dec - 06 Dec	SWISS
05 Dec - 08 Dec	SWISS
10 Dec - 15 Jan	SWISS
15 Dec - 10 Jan	Virgin Atlantic
26 Dec - 17 Jan	Virgin Atlantic	direct
29 Dec - 08 Jan	Virgin Atlantic	direct
16 Dec - 06 Jan	Virgin Atlantic
25 Dec - 08 Jan	Virgin Atlantic	direct
28 Dec - 10 Jan	Brussels Airlines
30 Dec - 13 Jan	SWISS
30 Dec - 06 Jan	KLM	direct
10 Dec - 15 Jan	British Airways	direct

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 354€

Return flights