AirHint found the following cheapest return flights from Dallas-Fort Worth (DFW) to London (LGW) in September 2025 (see full year).

Return flights

09 Sep - 15 Sep	Frontier Airlines
21 Sep - 30 Sep	Spirit Airlines
25 Sep - 02 Oct	Spirit Airlines
03 Sep - 10 Sep	Frontier Airlines
06 Sep - 20 Sep	Frontier Airlines
15 Sep - 22 Sep	Frontier Airlines
10 Sep - 17 Sep	Frontier Airlines
03 Sep - 12 Sep	Frontier Airlines
17 Sep - 23 Sep	Frontier Airlines
11 Sep - 18 Sep	Frontier Airlines
11 Sep - 21 Sep	Spirit Airlines
30 Sep - 15 Oct	Spirit Airlines
23 Sep - 10 Oct	Frontier Airlines
29 Sep - 10 Oct	Frontier Airlines
19 Sep - 02 Oct	Spirit Airlines
19 Sep - 01 Oct	Spirit Airlines
18 Sep - 15 Oct	Turkish Airlines

Also check the deals for one-way flights from Dallas-Fort Worth 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.

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Cheapest return flights from Dallas-Fort Worth to London in September from 403€

Return flights