AirHint found the following cheapest return flights from Detroit (DTW) to Seoul (ICN) in October 2026 (see full year).
Return flights
| 01 Oct - 01 Nov | Turkish Airlines | ||
| 01 Oct - 29 Oct | Alaska Airlines | ||
| 01 Oct - 29 Oct | Delta | direct | |
| 01 Oct - 01 Nov | Delta | direct |
Also check the deals for one-way flights from Detroit to Seoul in October.
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