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

Return flights

26 Dec - 12 Jan	Delta
24 Dec - 02 Jan	Delta
26 Dec - 09 Jan	Air France
26 Dec - 10 Jan	Air France
15 Dec - 07 Jan	Delta
12 Dec - 08 Jan	Delta
16 Dec - 23 Dec	Delta
14 Dec - 24 Dec	Air France
21 Dec - 09 Jan	Scandinavian Airlines
14 Dec - 22 Dec	Air France
19 Dec - 08 Jan	Scandinavian Airlines
13 Dec - 20 Dec	Delta
12 Dec - 11 Jan	Delta
14 Dec - 16 Dec	Delta
27 Dec - 03 Jan	Delta
14 Dec - 19 Dec	Air France
14 Dec - 30 Dec	Delta
25 Dec - 30 Dec	Delta
24 Dec - 31 Dec	Delta
17 Dec - 26 Dec	Delta

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 $1251

Return flights