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

Return flights

25 Dec - 17 Jan	SWISS
26 Dec - 20 Jan	Lufthansa
26 Dec - 13 Jan	Lufthansa
26 Dec - 14 Jan	Lufthansa
26 Dec - 15 Jan	Lufthansa
26 Dec - 16 Jan	Lufthansa
29 Dec - 19 Jan	Finnair
29 Dec - 14 Jan	Finnair
27 Dec - 28 Jan	Finnair
27 Dec - 30 Jan	Finnair
27 Dec - 29 Dec	Air France
27 Dec - 28 Dec	American Airlines
26 Dec - 29 Dec	ITA Airways
26 Dec - 28 Dec	Iberia
24 Dec - 29 Dec	ITA Airways
24 Dec - 28 Dec	ITA Airways
24 Dec - 30 Dec	Wizz Air Malta
26 Dec - 31 Dec	Lufthansa
24 Dec - 31 Dec	Wizz Air Malta
27 Dec - 31 Dec	Finnair

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 387€

Return flights