AirHint found the following cheapest return flights from Washington (IAD) to Seoul (ICN) in October 2026 (see full year).
Return flights
| 14 Oct - 03 Nov | Turkish Airlines | ||
| 06 Oct - 03 Nov | Turkish Airlines | ||
| 20 Oct - 03 Nov | Turkish Airlines | ||
| 06 Oct - 03 Nov | Delta | direct | |
| 20 Oct - 03 Nov | Delta | direct | |
| 14 Oct - 03 Nov | Delta | direct |
Also check the deals for one-way flights from Washington to Seoul in October.
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