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

Return flights

05 Dec - 09 Dec	TAP
03 Dec - 09 Dec	TAP
04 Dec - 11 Dec	TAP
11 Dec - 09 Jan	TAP
11 Dec - 16 Dec	TAP
05 Dec - 12 Dec	TAP
04 Dec - 07 Dec	TAP
09 Dec - 15 Dec	Aer Lingus
01 Dec - 23 Dec	Icelandair
30 Dec - 18 Jan	Icelandair
12 Dec - 14 Dec	Icelandair
01 Dec - 05 Dec	Icelandair
30 Dec - 12 Jan	Icelandair
01 Dec - 01 Jan	Icelandair
29 Dec - 02 Jan	Icelandair
13 Dec - 01 Jan	Icelandair
25 Dec - 16 Jan	TAP
23 Dec - 16 Jan	Icelandair
29 Dec - 05 Jan	Icelandair
30 Dec - 04 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 $386

Return flights