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

Return flights

10 Dec - 21 Jan	TAP
03 Dec - 10 Dec	TAP
04 Dec - 08 Dec	TAP
05 Dec - 08 Dec	TAP
11 Dec - 14 Jan	TAP
08 Dec - 10 Dec	Air Canada
05 Dec - 07 Dec	Scandinavian Airlines
15 Dec - 26 Jan	TAP
10 Dec - 09 Jan	TAP
01 Dec - 26 Jan	TAP
13 Dec - 15 Dec	Scandinavian Airlines
02 Dec - 09 Dec	TAP
15 Dec - 20 Jan	TAP
12 Dec - 14 Dec	Scandinavian Airlines
05 Dec - 12 Dec	TAP
12 Dec - 19 Jan	Air Canada
12 Dec - 15 Dec	Scandinavian Airlines
12 Dec - 16 Jan	Aer Lingus
12 Dec - 18 Jan	Aer Lingus
10 Dec - 12 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 328€

Return flights