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

Return flights

03 Dec - 10 Dec	Air Canada
06 Dec - 27 Jan	Iberia
06 Dec - 09 Dec	Iberia
06 Dec - 13 Dec	Iberia
07 Dec - 12 Dec	Norse Atlantic Airways
10 Dec - 13 Dec	Air Canada
10 Dec - 17 Dec	Icelandair
30 Dec - 15 Jan	Air Canada
12 Dec - 14 Dec	Norse Atlantic Airways
08 Dec - 12 Dec	Norse Atlantic Airways
12 Dec - 12 Jan	Aer Lingus
13 Dec - 12 Jan	Aer Lingus
12 Dec - 18 Jan	Aer Lingus
09 Dec - 17 Dec	Aer Lingus
12 Dec - 17 Dec	Aer Lingus
14 Dec - 14 Jan	Aer Lingus
12 Dec - 11 Jan	Aer Lingus
11 Dec - 18 Jan	Aer Lingus
11 Dec - 17 Jan	Aer Lingus
15 Dec - 13 Jan	Aer Lingus

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 343€

Return flights