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

Return flights

13 Dec - 20 Dec	United
14 Dec - 21 Dec	United
12 Dec - 17 Dec	Delta
16 Dec - 23 Dec	Air France
26 Dec - 22 Jan	Spirit Airlines
31 Dec - 07 Jan	Spirit Airlines
23 Dec - 28 Dec	Spirit Airlines
23 Dec - 30 Dec	Spirit Airlines
31 Dec - 04 Jan	Spirit Airlines
30 Dec - 04 Jan	Lufthansa
29 Dec - 04 Jan	Spirit Airlines
24 Dec - 01 Jan	Spirit Airlines

Also check the deals for one-way flights from Detroit to Lisbon 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 Lisbon in December from 537€

Return flights