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

Return flights

01 Dec - 11 Dec	Air Canada
05 Dec - 14 Dec	TAP
05 Dec - 08 Dec	TAP
03 Dec - 12 Dec	TAP
03 Dec - 08 Dec	TAP
03 Dec - 07 Dec	TAP
04 Dec - 07 Dec	TAP
03 Dec - 10 Dec	TAP
04 Dec - 10 Dec	TAP
04 Dec - 12 Dec	TAP
29 Dec - 12 Jan	Air Canada
13 Dec - 13 Jan	Aer Lingus
09 Dec - 19 Jan	Aer Lingus
15 Dec - 01 Jan	TAP
10 Dec - 09 Jan	Icelandair
29 Dec - 09 Jan	Air Canada
10 Dec - 07 Jan	Icelandair
15 Dec - 10 Jan	TAP
13 Dec - 10 Jan	Spirit Airlines
16 Dec - 10 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 $404

Return flights