AirHint found the following cheapest one-way flights from Washington (IAD) to Seoul (ICN) in October 2025 (see full year).
One-Way flights
| 22 Oct | Frontier Airlines | ||
| 27 Oct | Alaska Airlines | ||
| 26 Oct | Turkish Airlines | ||
| 30 Oct | Asiana Airlines | ||
| 27 Oct | Delta | direct | |
| 26 Oct | Korean Air | direct | |
| 22 Oct | Korean Air | direct | |
| 23 Oct | Korean Air | direct |
Also check the deals for return flights from Washington to Seoul in October.
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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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