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

Return flights

08 Sep - 15 Sep	Finnair
10 Sep - 30 Sep	Finnair
14 Sep - 24 Sep	Air Canada
24 Sep - 01 Oct	British Airways
30 Sep - 07 Oct	British Airways
03 Sep - 17 Sep	Finnair
03 Sep - 16 Sep	Finnair
24 Sep - 29 Sep	Finnair
01 Sep - 08 Sep	Finnair
10 Sep - 17 Sep	Finnair
03 Sep - 11 Sep	Finnair
29 Sep - 15 Oct	British Airways
24 Sep - 15 Oct	British Airways
09 Sep - 16 Sep	Finnair
30 Sep - 15 Oct	Air Canada
29 Sep - 15 Oct	Finnair	direct
24 Sep - 15 Oct	Finnair	direct
29 Sep - 10 Oct	Delta
27 Sep - 04 Oct	British Airways
26 Sep - 05 Oct	Frontier 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 498€

Return flights