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

Return flights

05 Dec - 07 Dec	Scandinavian Airlines
12 Dec - 14 Dec	Scandinavian Airlines
06 Dec - 08 Dec	Scandinavian Airlines
04 Dec - 09 Dec	TAP
03 Dec - 08 Dec	TAP
04 Dec - 08 Dec	TAP
03 Dec - 09 Dec	TAP
04 Dec - 10 Dec	TAP
05 Dec - 08 Dec	Scandinavian Airlines
06 Dec - 13 Dec	Air Canada
29 Dec - 15 Jan	Air Canada
10 Dec - 10 Jan	Air Canada
29 Dec - 24 Jan	Air Canada
11 Dec - 12 Jan	Air Canada
29 Dec - 09 Jan	Air Canada
25 Dec - 09 Jan	Air Canada
23 Dec - 15 Jan	Air Canada
25 Dec - 17 Jan	Air Canada
09 Dec - 07 Jan	Air Canada
24 Dec - 25 Jan	Air Canada

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 $402

Return flights