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

Return flights

14 Sep - 21 Sep	Ryanair
14 Sep - 17 Sep	Ryanair
05 Sep - 07 Sep	Ryanair
12 Sep - 17 Sep	Ryanair
14 Sep - 28 Sep	Ryanair
12 Sep - 20 Sep	Ryanair
16 Sep - 21 Sep	Ryanair
11 Sep - 17 Sep	Ryanair
11 Sep - 14 Sep	Ryanair
12 Sep - 21 Sep	Ryanair
25 Sep - 01 Oct	Ryanair
26 Sep - 04 Oct	Ryanair
30 Sep - 02 Oct	Ryanair
25 Sep - 09 Oct	Ryanair
24 Sep - 01 Oct	Ryanair
27 Sep - 04 Oct	Ryanair
09 Sep - 01 Oct	Ryanair
08 Sep - 01 Oct	Ryanair
17 Sep - 02 Oct	Ryanair
10 Sep - 10 Oct	Ryanair

Also check the deals for one-way flights from London to New York 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 New York in September from 351€

Return flights