Cheapest return flights from Washington to Seoul in September from $915

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

Return flights

25 Sep - 09 Oct Porter Airlines (Canada) Ltd
25 Sep - 07 Oct Porter Airlines (Canada) Ltd
15 Sep - 15 Oct Turkish Airlines
08 Sep - 23 Sep Turkish Airlines
30 Sep - 14 Oct Turkish Airlines
14 Sep - 08 Oct Turkish Airlines
15 Sep - 08 Oct Turkish Airlines
09 Sep - 15 Sep Porter Airlines (Canada) Ltd
26 Sep - 10 Oct WestJet
01 Sep - 06 Sep Turkish Airlines
01 Sep - 07 Sep Turkish Airlines
07 Sep - 14 Sep Porter Airlines (Canada) Ltd
09 Sep - 24 Sep Turkish Airlines
30 Sep - 10 Oct Turkish Airlines
26 Sep - 17 Oct Turkish Airlines
29 Sep - 30 Oct Turkish Airlines
17 Sep - 21 Sep Air Canada
19 Sep - 27 Sep Air Canada
05 Sep - 14 Sep Air Canada
15 Sep - 30 Sep China Airlines

Also check the deals for one-way flights from Washington to Seoul in September.

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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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