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

Return flights

14 Sep - 29 Sep	Icelandair
26 Sep - 01 Oct	Icelandair
05 Sep - 12 Sep	Icelandair
19 Sep - 24 Sep	Icelandair
29 Sep - 03 Oct	Icelandair
25 Sep - 30 Sep	Icelandair
21 Sep - 30 Sep	Icelandair
16 Sep - 30 Sep	Icelandair
17 Sep - 30 Sep	Icelandair
25 Sep - 03 Oct	Icelandair
25 Sep - 02 Oct	Icelandair
24 Sep - 01 Oct	Icelandair
16 Sep - 07 Oct	Icelandair
24 Sep - 04 Oct	Icelandair
30 Sep - 04 Oct	Icelandair
19 Sep - 30 Sep	Icelandair
10 Sep - 15 Sep	Icelandair
24 Sep - 27 Sep	Icelandair
28 Sep - 05 Oct	SWISS
25 Sep - 22 Oct	SWISS

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 $428

Return flights