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

Return flights

25 Sep - 29 Sep	Ryanair
27 Sep - 29 Sep	Ryanair
11 Sep - 15 Sep	Ryanair
13 Sep - 20 Sep	Ryanair
04 Sep - 20 Sep	Ryanair
07 Sep - 21 Sep	Ryanair
06 Sep - 21 Sep	Ryanair
04 Sep - 08 Sep	Ryanair
06 Sep - 20 Sep	Ryanair
24 Sep - 29 Sep	Ryanair
25 Sep - 12 Oct	Ryanair
30 Sep - 05 Oct	Ryanair
30 Sep - 07 Oct	Ryanair
26 Sep - 05 Oct	Ryanair
27 Sep - 04 Oct	Ryanair
29 Sep - 02 Oct	Ryanair
27 Sep - 03 Oct	Ryanair
26 Sep - 03 Oct	Ryanair
25 Sep - 02 Oct	Ryanair
27 Sep - 06 Oct	Ryanair

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 325€

Return flights