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

Return flights

03 Dec - 07 Dec	Spirit Airlines
06 Dec - 10 Dec	jetBlue
15 Dec - 15 Jan	Scandinavian Airlines
30 Dec - 20 Jan	jetBlue
01 Dec - 05 Dec	Icelandair
27 Dec - 07 Jan	Spirit Airlines
27 Dec - 17 Jan	jetBlue
01 Dec - 18 Jan	jetBlue
21 Dec - 10 Jan	Spirit Airlines
24 Dec - 31 Dec	Spirit Airlines
17 Dec - 01 Jan	Spirit Airlines
22 Dec - 05 Jan	jetBlue
08 Dec - 16 Jan	United
30 Dec - 20 Jan	Air France	direct
10 Dec - 31 Dec	United
22 Dec - 27 Dec	Spirit Airlines
11 Dec - 31 Dec	United
15 Dec - 31 Dec	Air Canada
23 Dec - 31 Dec	Delta
24 Dec - 31 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.

Book a cheap hotel in London

Cheap car rent in London

Cheapest return flights from Detroit to London in December from $562

Return flights