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

Return flights

09 Sep - 23 Sep	TAP
03 Sep - 11 Sep	TAP
04 Sep - 16 Sep	TAP
07 Sep - 17 Sep	TAP
03 Sep - 06 Sep	Icelandair
11 Sep - 15 Sep	Icelandair
09 Sep - 17 Sep	Air Canada
05 Sep - 16 Sep	Air Canada
30 Sep - 07 Oct	Icelandair
30 Sep - 14 Oct	Icelandair
14 Sep - 20 Sep	Icelandair
15 Sep - 19 Sep	Icelandair
09 Sep - 04 Oct	Icelandair
19 Sep - 05 Oct	Icelandair
22 Sep - 22 Oct	Icelandair
28 Sep - 03 Oct	Icelandair
29 Sep - 06 Oct	Icelandair
29 Sep - 13 Oct	Icelandair
16 Sep - 07 Oct	Icelandair
17 Sep - 06 Oct	Icelandair

Also check the deals for one-way flights from Newark to London in September.

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 September from $372

Return flights