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

Return flights

02 Dec - 09 Dec	Spirit Airlines
04 Dec - 15 Jan	Condor
05 Dec - 15 Jan	Condor
02 Dec - 09 Dec	Lufthansa	direct
23 Dec - 08 Jan	Air Canada
25 Dec - 06 Jan	Condor
24 Dec - 09 Jan	Virgin Atlantic	direct
01 Dec - 27 Dec	Icelandair
24 Dec - 08 Jan	Air France
24 Dec - 08 Jan	Lufthansa	direct
16 Dec - 30 Dec	Delta
12 Dec - 22 Dec	Spirit Airlines
01 Dec - 27 Dec	Lufthansa	direct
04 Dec - 15 Jan	Lufthansa	direct
05 Dec - 15 Jan	Lufthansa	direct
12 Dec - 22 Dec	Air France	direct
17 Dec - 24 Dec	Air Canada
01 Dec - 01 Jan	Icelandair
16 Dec - 30 Dec	Lufthansa	direct
17 Dec - 24 Dec	Air France	direct

Also check the deals for one-way flights from Detroit to Frankfurt 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 Frankfurt in December from $646

Return flights