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

Return flights

03 Dec - 07 Dec	TAP
04 Dec - 07 Dec	TAP
02 Dec - 08 Dec	TAP
08 Dec - 14 Dec	TAP
11 Dec - 16 Dec	TAP
02 Dec - 07 Dec	Aer Lingus
09 Dec - 15 Dec	TAP
08 Dec - 15 Dec	TAP
02 Dec - 10 Dec	TAP
11 Dec - 15 Dec	TAP
16 Dec - 09 Jan	TAP
29 Dec - 15 Jan	TAP
14 Dec - 09 Jan	Icelandair
12 Dec - 09 Jan	TAP
10 Dec - 10 Jan	TAP
05 Dec - 09 Jan	TAP
10 Dec - 07 Jan	Icelandair
09 Dec - 07 Jan	Icelandair
15 Dec - 07 Jan	Icelandair
17 Dec - 14 Jan	TAP

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 350€

Return flights