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

Return flights

20 Aug - 27 Aug	Spirit Airlines
18 Aug - 28 Aug	Spirit Airlines
11 Aug - 25 Aug	Spirit Airlines
09 Aug - 24 Aug	Spirit Airlines
01 Aug - 30 Sep	Spirit Airlines
14 Aug - 29 Aug	United
15 Aug - 29 Aug	United
14 Aug - 28 Aug	Delta	direct
11 Aug - 25 Aug	Delta	direct
18 Aug - 28 Aug	Delta	direct
25 Aug - 04 Sep	Delta	direct
13 Aug - 31 Aug	Delta	direct
26 Aug - 06 Sep	Delta	direct
01 Aug - 30 Sep	Delta	direct

Also check the deals for one-way flights from Detroit to Seoul in August.

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 August from 837€

Return flights