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

Return flights

23 Sep - 30 Sep	Air Canada
22 Sep - 30 Sep	Air Canada
29 Sep - 15 Oct	Delta
30 Sep - 15 Oct	KLM
24 Sep - 01 Oct	United
23 Sep - 30 Sep	Iberia	direct
21 Sep - 07 Oct	British Airways	direct
24 Sep - 01 Oct	British Airways	direct
29 Sep - 10 Oct	United
26 Sep - 03 Oct	Lufthansa
29 Sep - 15 Oct	Iberia	direct
30 Sep - 15 Oct	Iberia	direct
22 Sep - 28 Sep	Air Canada
26 Sep - 03 Oct	British Airways	direct
24 Sep - 28 Sep	Iberia	direct
16 Sep - 22 Sep	Scandinavian Airlines
26 Sep - 29 Sep	British Airways	direct
25 Sep - 28 Sep	Iberia
24 Sep - 30 Sep	British Airways	direct
27 Sep - 30 Sep	Scandinavian 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 431€

Return flights