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
03 Dec - 08 Dec	TAP
04 Dec - 08 Dec	TAP
04 Dec - 07 Dec	Air Canada
04 Dec - 11 Dec	TAP
10 Dec - 15 Dec	TAP
11 Dec - 16 Dec	TAP
04 Dec - 12 Dec	TAP
10 Dec - 16 Dec	TAP
05 Dec - 15 Dec	TAP
10 Dec - 14 Jan	Aer Lingus
31 Dec - 09 Jan	Air Canada
31 Dec - 30 Jan	Air Canada
29 Dec - 24 Jan	Air Canada
29 Dec - 09 Jan	Air Canada
31 Dec - 24 Jan	Air Canada
30 Dec - 09 Jan	Air Canada
13 Dec - 13 Jan	Aer Lingus
24 Dec - 17 Jan	Air Canada
23 Dec - 13 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