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

Return flights

03 Dec - 10 Dec	TAP
05 Dec - 07 Dec	Iberia
12 Dec - 14 Dec	Iberia
08 Dec - 10 Dec	SWISS
09 Dec - 11 Dec	SWISS
02 Dec - 04 Dec	SWISS
03 Dec - 05 Dec	SWISS
03 Dec - 12 Dec	TAP
10 Dec - 13 Jan	TAP
03 Dec - 08 Dec	TAP
03 Dec - 07 Dec	TAP
10 Dec - 13 Jan	British Airways	direct
10 Dec - 09 Jan	British Airways	direct
10 Dec - 12 Jan	British Airways	direct
31 Dec - 24 Jan	Finnair
31 Dec - 24 Jan	British Airways	direct
11 Dec - 11 Jan	British Airways	direct
10 Dec - 11 Jan	British Airways	direct
12 Dec - 11 Jan	British Airways	direct
31 Dec - 10 Jan	British Airways	direct

Also check the deals for one-way flights from New York to London 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 New York to London in December from $385

Return flights