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

Return flights

12 Dec - 16 Dec	jetBlue
05 Dec - 17 Jan	jetBlue
12 Dec - 14 Dec	jetBlue
25 Dec - 29 Dec	TAP
15 Dec - 22 Dec	jetBlue
12 Dec - 16 Dec	Air France	direct
17 Dec - 30 Dec	Icelandair
12 Dec - 14 Dec	Air France	direct
25 Dec - 02 Jan	Air Canada
15 Dec - 22 Dec	Air France	direct
26 Dec - 03 Jan	United
18 Dec - 01 Jan	TAP
19 Dec - 01 Jan	Icelandair
19 Dec - 04 Jan	Air Canada
19 Dec - 02 Jan	United
19 Dec - 01 Jan	Air France	direct
18 Dec - 01 Jan	Air France	direct
19 Dec - 02 Jan	Air France	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 $736

Return flights