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

Return flights

05 Dec - 09 Dec	TAP
05 Dec - 10 Dec	TAP
16 Dec - 19 Jan	TAP
08 Dec - 13 Jan	TAP
15 Dec - 18 Jan	TAP
16 Dec - 13 Jan	TAP
10 Dec - 11 Jan	TAP
12 Dec - 11 Jan	TAP
16 Dec - 12 Jan	TAP
15 Dec - 12 Jan	TAP
15 Dec - 15 Jan	TAP
08 Dec - 11 Jan	TAP
04 Dec - 09 Dec	TAP
08 Dec - 15 Dec	Icelandair
09 Dec - 16 Dec	Icelandair
02 Dec - 08 Dec	Icelandair
09 Dec - 15 Dec	Icelandair
08 Dec - 14 Dec	TAP
11 Dec - 14 Dec	TAP
17 Dec - 24 Dec	Icelandair

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 $436

Return flights