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

Return flights

03 Dec - 07 Dec	Icelandair
04 Dec - 10 Dec	TAP
04 Dec - 11 Dec	TAP
02 Dec - 09 Dec	TAP
05 Dec - 12 Dec	TAP
03 Dec - 08 Dec	TAP
10 Dec - 17 Dec	TAP
13 Dec - 20 Dec	Icelandair
23 Dec - 30 Dec	Icelandair
30 Dec - 06 Jan	TAP
01 Dec - 15 Dec	TAP
30 Dec - 09 Jan	TAP
28 Dec - 03 Jan	Air Canada
30 Dec - 04 Jan	Icelandair
26 Dec - 05 Jan	TAP
19 Dec - 03 Jan	Icelandair
31 Dec - 04 Jan	TAP
17 Dec - 03 Jan	TAP
19 Dec - 02 Jan	TAP
19 Dec - 04 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 $540

Return flights