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

Return flights

23 Sep - 28 Sep	SWISS
16 Sep - 21 Sep	SWISS
03 Sep - 08 Sep	Lufthansa
17 Sep - 21 Sep	SWISS
29 Sep - 13 Oct	British Airways
15 Sep - 07 Oct	British Airways
21 Sep - 26 Sep	KLM
15 Sep - 19 Sep	KLM
22 Sep - 26 Sep	KLM
11 Sep - 19 Sep	KLM
24 Sep - 02 Oct	KLM
30 Sep - 14 Oct	Lufthansa
07 Sep - 19 Sep	KLM
23 Sep - 26 Sep	KLM
26 Sep - 04 Oct	Virgin Atlantic
15 Sep - 01 Oct	British Airways
25 Sep - 11 Oct	British Airways
01 Sep - 15 Oct	British Airways
30 Sep - 15 Oct	British Airways
25 Sep - 02 Oct	British 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 423€

Return flights