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

Return flights

25 Oct - 07 Nov	WestJet
18 Oct - 23 Oct	Frontier Airlines
18 Oct - 01 Nov	Spirit Airlines
26 Oct - 29 Oct	Spirit Airlines
18 Oct - 25 Oct	Spirit Airlines
19 Oct - 26 Oct	Spirit Airlines
22 Oct - 13 Nov	Air Canada
16 Oct - 30 Oct	Alaska Airlines
21 Oct - 13 Nov	Air Canada
22 Oct - 13 Nov	Delta	direct
21 Oct - 13 Nov	Delta	direct
25 Oct - 07 Nov	Delta	direct
24 Oct - 31 Oct	Delta
16 Oct - 30 Oct	Delta	direct
16 Oct - 26 Oct	Delta	direct
15 Oct - 18 Oct	Air Canada
17 Oct - 24 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 828€

Return flights