Cheapest one-way flights from Washington to Seoul in September from $485

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

One-Way flights

07 Sep Porter Airlines (Canada) Ltd
11 Sep Porter Airlines (Canada) Ltd
10 Sep Turkish Airlines
24 Sep Turkish Airlines
22 Sep Turkish Airlines
17 Sep Turkish Airlines
08 Sep Turkish Airlines
30 Sep Turkish Airlines
13 Sep Turkish Airlines
23 Sep Turkish Airlines

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

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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