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

Return flights

10 Dec - 11 Jan	TAP
08 Dec - 11 Jan	TAP
09 Dec - 12 Jan	TAP
08 Dec - 10 Jan	TAP
10 Dec - 28 Jan	TAP
11 Dec - 13 Jan	TAP
16 Dec - 15 Jan	TAP
16 Dec - 14 Jan	TAP
03 Dec - 16 Dec	Icelandair
04 Dec - 16 Dec	Icelandair
02 Dec - 16 Dec	Icelandair
09 Dec - 14 Dec	Icelandair
03 Dec - 06 Dec	Icelandair
04 Dec - 09 Dec	Icelandair
02 Dec - 15 Dec	Icelandair
03 Dec - 10 Dec	Icelandair
04 Dec - 14 Dec	Icelandair
09 Dec - 13 Dec	Icelandair
13 Dec - 12 Jan	TAP
16 Dec - 11 Jan	TAP

Also check the deals for one-way flights from London to Newark 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 London to Newark in December from 388€

Return flights