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

Return flights

21 Sep - 29 Sep	Delta
18 Sep - 29 Sep	Delta
20 Sep - 29 Sep	KLM
21 Sep - 25 Sep	Virgin Atlantic
11 Sep - 15 Sep	Delta
23 Sep - 26 Sep	KLM
19 Sep - 29 Sep	Delta
01 Sep - 05 Sep	Virgin Atlantic
18 Sep - 25 Sep	Iberia
15 Sep - 22 Sep	British Airways
28 Sep - 02 Oct	KLM
24 Sep - 01 Oct	SWISS
28 Sep - 03 Oct	KLM
30 Sep - 05 Oct	ITA Airways
28 Sep - 04 Oct	Aer Lingus
29 Sep - 04 Oct	Aer Lingus
30 Sep - 04 Oct	Aer Lingus
25 Sep - 04 Oct	Aer Lingus
23 Sep - 07 Oct	Aer Lingus
25 Sep - 02 Oct	KLM

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 $562

Return flights