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

Return flights

03 Dec - 15 Dec	Spirit Airlines
03 Dec - 10 Dec	Spirit Airlines
03 Dec - 11 Dec	Spirit Airlines
03 Dec - 20 Dec	United
16 Dec - 11 Jan	Spirit Airlines
16 Dec - 10 Jan	Spirit Airlines
16 Dec - 29 Dec	Spirit Airlines
16 Dec - 26 Dec	Spirit Airlines
19 Dec - 10 Jan	Spirit Airlines
25 Dec - 02 Jan	Turkish Airlines
26 Dec - 02 Jan	Turkish Airlines
28 Dec - 03 Jan	Turkish Airlines
20 Dec - 31 Dec	Air Canada

Also check the deals for one-way flights from Detroit to Barcelona 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 Barcelona in December from $408

Return flights