Cheapest return flights from Washington to Seoul in September from $1022

Best time to book flights for Washington (IAD) to Seoul (ICN) flights at AirHint

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

Return flights

10 Sep - 20 Oct Turkish Airlines
13 Sep - 11 Oct Turkish Airlines
05 Sep - 20 Sep Turkish Airlines
13 Sep - 11 Oct Korean Air direct
05 Sep - 20 Sep Korean Air direct
10 Sep - 20 Oct Korean Air direct

Also check the deals for one-way 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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