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

Return flights

02 Sep - 17 Sep	TAP
24 Sep - 02 Oct	Air Canada
14 Sep - 04 Oct	FrenchBee
02 Sep - 04 Sep	FrenchBee
06 Sep - 10 Sep	FrenchBee
04 Sep - 10 Sep	FrenchBee
23 Sep - 07 Oct	Air Canada
02 Sep - 09 Sep	TAP
16 Sep - 22 Sep	Air Canada
01 Sep - 07 Sep	Air Canada
25 Sep - 12 Oct	FrenchBee
08 Sep - 05 Oct	Icelandair
03 Sep - 17 Sep	Air Canada
20 Sep - 07 Oct	FrenchBee
25 Sep - 05 Oct	FrenchBee
08 Sep - 16 Sep	Air Canada
01 Sep - 10 Sep	FrenchBee
28 Sep - 02 Oct	Spirit Airlines
19 Sep - 05 Oct	FrenchBee
11 Sep - 07 Oct	FrenchBee

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 $400

Return flights