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

Return flights

24 Sep - 28 Sep	SWISS
30 Sep - 08 Oct	SWISS
25 Sep - 29 Sep	SWISS
16 Sep - 29 Sep	SWISS
14 Sep - 24 Sep	SWISS
02 Sep - 10 Sep	SWISS
18 Sep - 23 Sep	SWISS
18 Sep - 22 Sep	SWISS
25 Sep - 03 Oct	SWISS
23 Sep - 27 Sep	Delta
22 Sep - 29 Sep	SWISS
07 Sep - 10 Sep	SWISS
28 Sep - 05 Oct	SWISS
19 Sep - 19 Oct	SWISS
19 Sep - 05 Oct	SWISS
26 Sep - 04 Oct	SWISS
28 Sep - 11 Oct	SWISS
30 Sep - 07 Oct	SWISS
25 Sep - 11 Oct	SWISS
25 Sep - 02 Oct	SWISS

Also check the deals for one-way flights from London to Newark 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 London to Newark in September from $537

Return flights