Cheapest one-way flights from Washington to Seoul in October from $445

AirHint found the following cheapest one-way flights from Washington (IAD) to Seoul (ICN) in October 2025 (see full year).

One-Way flights

23 Oct Alaska Airlines
01 Oct Alaska Airlines
25 Oct Frontier Airlines
27 Oct Turkish Airlines
22 Oct Turkish Airlines
17 Oct Frontier Airlines
20 Oct Turkish Airlines
15 Oct Frontier Airlines
28 Oct Turkish Airlines
07 Oct Air Canada

Also check the deals for return flights from Washington to Seoul in October.

Skyscanner

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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