AirHint found the following cheapest return flights from London (LON) to New York (JFK) in September 2026 (see full year).

Return flights

22 Sep - 25 Sep	Norse Atlantic Airways (UK)	direct
28 Sep - 05 Oct	Icelandair
24 Sep - 15 Oct	Icelandair
17 Sep - 13 Oct	Icelandair
30 Sep - 07 Oct	Icelandair
28 Sep - 02 Oct	Icelandair
29 Sep - 06 Oct	Icelandair
30 Sep - 04 Oct	Icelandair
29 Sep - 09 Oct	Icelandair
26 Sep - 04 Oct	Icelandair
25 Sep - 04 Oct	Icelandair
15 Sep - 22 Sep	Icelandair
17 Sep - 27 Sep	Icelandair
02 Sep - 09 Sep	Icelandair
20 Sep - 24 Sep	Icelandair
14 Sep - 20 Sep	Icelandair
22 Sep - 29 Sep	Icelandair
16 Sep - 26 Sep	Icelandair
18 Sep - 26 Sep	Icelandair
10 Sep - 19 Sep	Icelandair

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 340€

Return flights