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

Return flights

22 Sep - 24 Sep	Spirit Airlines
22 Sep - 26 Sep	Frontier Airlines
23 Sep - 30 Sep	Spirit Airlines
22 Sep - 27 Sep	Spirit Airlines
08 Sep - 15 Sep	Spirit Airlines
06 Sep - 20 Sep	Spirit Airlines
12 Sep - 20 Sep	Frontier Airlines
10 Sep - 17 Sep	Spirit Airlines
27 Sep - 05 Oct	Spirit Airlines
06 Sep - 11 Sep	Spirit Airlines
04 Sep - 18 Sep	Frontier Airlines
29 Sep - 10 Oct	Frontier Airlines
24 Sep - 15 Oct	Frontier Airlines
18 Sep - 15 Oct	Lufthansa

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 401€

Return flights