AirHint found the following cheapest return flights from Newark (EWR) to London (LGW) in December 2025 (see full year).

Return flights

03 Dec - 08 Dec	Icelandair
02 Dec - 09 Dec	Icelandair
03 Dec - 07 Dec	Icelandair
01 Dec - 08 Dec	Icelandair
09 Dec - 17 Dec	Icelandair
11 Dec - 16 Dec	Icelandair
08 Dec - 16 Dec	Icelandair
11 Dec - 18 Dec	Icelandair
09 Dec - 19 Dec	Icelandair
05 Dec - 10 Dec	TAP
23 Dec - 25 Jan	Icelandair
23 Dec - 10 Jan	Icelandair
14 Dec - 26 Jan	Icelandair
31 Dec - 07 Jan	Icelandair
06 Dec - 03 Jan	Icelandair
06 Dec - 04 Jan	Icelandair
26 Dec - 10 Jan	Icelandair
30 Dec - 04 Jan	Icelandair
20 Dec - 17 Jan	Icelandair
29 Dec - 05 Jan	Icelandair

Also check the deals for one-way flights from Newark 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 Newark to London in December from $490

Return flights