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

Return flights

16 Oct - 26 Oct	Spirit Airlines
03 Oct - 01 Nov	Spirit Airlines
17 Oct - 01 Nov	Spirit Airlines
03 Oct - 05 Oct	Spirit Airlines
03 Oct - 11 Oct	Air Canada
04 Oct - 19 Oct	Air Canada
16 Oct - 08 Nov	Air Canada
09 Oct - 26 Oct	Spirit Airlines
04 Oct - 19 Oct	Delta	direct
03 Oct - 01 Nov	Delta	direct
16 Oct - 26 Oct	Delta	direct
16 Oct - 08 Nov	Delta	direct
03 Oct - 11 Oct	Delta	direct

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

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 October from 846€

Return flights