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

Return flights

01 Dec - 31 Jan	Turkish Airlines
12 Dec - 30 Dec	jetBlue
15 Dec - 17 Dec	jetBlue
16 Dec - 23 Dec	jetBlue
14 Dec - 28 Dec	Icelandair
15 Dec - 31 Dec	Icelandair
01 Dec - 31 Jan	Air France	direct
16 Dec - 23 Dec	Air France	direct
25 Dec - 03 Jan	Air Canada
11 Dec - 03 Jan	Icelandair
22 Dec - 03 Jan	Air Canada
20 Dec - 27 Dec	Air Canada
14 Dec - 28 Dec	Air France	direct
25 Dec - 04 Jan	Air Canada
11 Dec - 04 Jan	Air Canada
28 Dec - 03 Jan	jetBlue
20 Dec - 27 Dec	Air France	direct
15 Dec - 17 Dec	Delta	direct

Also check the deals for one-way flights from Detroit 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 Detroit to London in December from $817

Return flights