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

Return flights

07 Dec - 14 Dec	Frontier Airlines
30 Dec - 13 Jan	Spirit Airlines
05 Dec - 19 Dec	Alaska Airlines
08 Dec - 23 Dec	Frontier Airlines
31 Dec - 16 Jan	Spirit Airlines
07 Dec - 23 Dec	Frontier Airlines
24 Dec - 13 Jan	Spirit Airlines
24 Dec - 09 Jan	Frontier Airlines
15 Dec - 15 Jan	Spirit Airlines
23 Dec - 26 Dec	Frontier Airlines
11 Dec - 11 Jan	Air Canada
11 Dec - 09 Jan	WestJet
13 Dec - 09 Jan	Frontier Airlines
23 Dec - 27 Dec	Frontier Airlines
13 Dec - 11 Jan	Frontier Airlines
12 Dec - 09 Jan	Frontier Airlines
08 Dec - 23 Dec	Delta	direct
04 Dec - 20 Dec	Delta	direct
08 Dec - 13 Dec	jetBlue
05 Dec - 19 Dec	Delta	direct

Also check the deals for one-way flights from Detroit to Seoul 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 Seoul in December from 979€

Return flights