AirHint found the following cheapest return flights from Newark (EWR) to London (LGW) in September 2026 (see full year).

Return flights

28 Sep - 12 Oct	Icelandair
23 Sep - 01 Oct	Icelandair
23 Sep - 04 Oct	TAP
27 Sep - 12 Oct	Icelandair
16 Sep - 12 Oct	Icelandair
13 Sep - 19 Sep	TAP
09 Sep - 19 Sep	TAP
03 Sep - 12 Sep	TAP
24 Sep - 27 Sep	TAP
02 Sep - 09 Sep	TAP
06 Sep - 26 Sep	TAP
02 Sep - 21 Sep	TAP
04 Sep - 06 Sep	TAP
04 Sep - 12 Sep	TAP

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.

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Cheapest return flights from Newark to London in September from $484

Return flights