AirHint found the following cheapest return flights from Dallas (DAL) to London (LHR) in December 2025 (see full year).

Return flights

10 Dec - 17 Dec	Air France
12 Dec - 17 Dec	Air France
10 Dec - 14 Dec	Air France
29 Dec - 11 Jan	Air France
13 Dec - 09 Jan	Virgin Atlantic
12 Dec - 21 Dec	Air France
12 Dec - 15 Dec	Air France
23 Dec - 07 Jan	KLM
15 Dec - 10 Jan	Air France
23 Dec - 17 Jan	Air France
15 Dec - 22 Dec	Air France
15 Dec - 02 Jan	Virgin Atlantic
18 Dec - 25 Dec	Delta
20 Dec - 27 Dec	Virgin Atlantic
17 Dec - 02 Jan	Virgin Atlantic
20 Dec - 01 Jan	Delta
21 Dec - 02 Jan	Delta
08 Dec - 13 Dec	Air France
29 Dec - 02 Jan	Delta
22 Dec - 26 Dec	Air France

Also check the deals for one-way flights from Dallas to London in December.

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 to London in December from 641€

Return flights