AirHint found the following cheapest return flights from London (LHR) to New York (JFK) in September 2025 (see full year).

Return flights

09 Sep - 15 Sep	Aer Lingus
09 Sep - 16 Sep	Aer Lingus
16 Sep - 23 Sep	Aer Lingus
16 Sep - 22 Sep	Aer Lingus
10 Sep - 15 Sep	Aer Lingus
10 Sep - 17 Sep	Aer Lingus
16 Sep - 23 Oct	Aer Lingus
16 Sep - 09 Oct	Aer Lingus
10 Sep - 01 Oct	Aer Lingus
10 Sep - 18 Sep	Aer Lingus
10 Sep - 23 Sep	Aer Lingus
09 Sep - 07 Oct	Aer Lingus
15 Sep - 22 Sep	Aer Lingus
16 Sep - 21 Sep	Aer Lingus
16 Sep - 10 Oct	Aer Lingus
18 Sep - 01 Oct	Aer Lingus
11 Sep - 07 Oct	Aer Lingus
09 Sep - 17 Oct	Aer Lingus
13 Sep - 02 Oct	Aer Lingus
18 Sep - 13 Oct	Aer Lingus

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.

Book a cheap hotel in New York

Cheap car rent in New York

Cheapest return flights from London to New York in September from $430

Return flights