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

Return flights

04 Dec - 09 Dec	TAP
12 Dec - 14 Dec	Scandinavian Airlines
12 Dec - 15 Dec	Scandinavian Airlines
02 Dec - 08 Dec	TAP
06 Dec - 17 Jan	Aer Lingus
09 Dec - 12 Dec	Aer Lingus
03 Dec - 08 Dec	TAP
04 Dec - 07 Dec	Aer Lingus
30 Dec - 12 Jan	Air Canada
05 Dec - 13 Dec	Air Canada
02 Dec - 16 Dec	Air Canada
01 Dec - 10 Dec	Air Canada
22 Dec - 23 Jan	Air Canada
23 Dec - 23 Jan	Air Canada
23 Dec - 24 Jan	Air Canada
23 Dec - 25 Jan	Air Canada
15 Dec - 15 Jan	Air Canada
15 Dec - 09 Jan	Icelandair
28 Dec - 06 Jan	Air Canada
24 Dec - 09 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.

Book a cheap hotel in London

Cheap car rent in London

Cheapest return flights from Newark to London in December from $393

Return flights