AirHint found the following cheapest return flights from Dallas (DAL) to London (LHR) in March 2026 (see full year).

Return flights

18 Mar - 25 Mar	Delta
03 Mar - 10 Mar	Delta
20 Mar - 26 Mar	Air France
01 Mar - 08 Mar	KLM
07 Mar - 18 Mar	KLM
29 Mar - 27 Apr	KLM
26 Mar - 02 Apr	Air France
17 Mar - 04 Apr	Air France
29 Mar - 13 Apr	KLM
12 Mar - 24 Mar	Air France
07 Mar - 16 Mar	KLM
06 Mar - 06 Apr	KLM
14 Mar - 22 Mar	Delta
12 Mar - 21 Mar	Delta
13 Mar - 22 Mar	Air France
30 Mar - 02 Apr	Delta
28 Mar - 03 Apr	Delta

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

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 March from $820

Return flights