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

Return flights

30 Sep - 06 Oct	KLM
28 Sep - 12 Oct	KLM
28 Sep - 08 Oct	KLM
22 Sep - 29 Sep	KLM
30 Sep - 05 Oct	KLM
14 Sep - 21 Sep	ITA Airways
30 Sep - 04 Oct	KLM
24 Sep - 28 Sep	KLM
25 Sep - 28 Sep	KLM
25 Sep - 29 Sep	KLM
22 Sep - 27 Sep	KLM
24 Sep - 29 Sep	KLM
24 Sep - 01 Oct	KLM
25 Sep - 02 Oct	KLM
24 Sep - 02 Oct	KLM
07 Sep - 24 Sep	SWISS
29 Sep - 13 Oct	KLM
17 Sep - 06 Oct	ITA Airways
16 Sep - 23 Sep	ITA Airways
15 Sep - 23 Sep	ITA Airways

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 $645

Return flights