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

Return flights

30 Sep - 14 Oct	Air Canada
10 Sep - 16 Sep	Lufthansa
19 Sep - 24 Sep	Lufthansa
16 Sep - 24 Sep	Air Canada
16 Sep - 23 Sep	Air Canada
17 Sep - 24 Sep	Lufthansa
17 Sep - 22 Sep	Air Canada
19 Sep - 21 Sep	Air Canada
10 Sep - 17 Sep	Air Canada
14 Sep - 23 Sep	Air Canada
16 Sep - 26 Sep	Lufthansa
23 Sep - 03 Oct	Lufthansa
27 Sep - 01 Oct	Spirit Airlines
24 Sep - 01 Oct	Spirit Airlines
28 Sep - 08 Oct	Spirit Airlines
29 Sep - 05 Oct	Spirit Airlines
28 Sep - 05 Oct	Spirit Airlines
24 Sep - 14 Oct	Spirit Airlines
30 Sep - 08 Oct	Spirit Airlines
27 Sep - 04 Oct	Spirit Airlines

Also check the deals for one-way flights from New York to London 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 London

Cheap car rent in London

Cheapest return flights from New York to London in September from $412

Return flights