Cheapest return flights from Washington to Seoul in September from $1052

AirHint found the following cheapest return flights from Washington (IAD) to Seoul (ICN) in September 2026 (see full year).

Return flights

01 Sep - 10 Sep Alaska Airlines
01 Sep - 04 Sep EVA Air
15 Sep - 22 Sep EVA Air
10 Sep - 10 Oct EVA Air
24 Sep - 03 Oct Alaska Airlines
02 Sep - 02 Oct Turkish Airlines
08 Sep - 15 Sep Turkish Airlines
01 Sep - 08 Sep Turkish Airlines
11 Sep - 18 Sep Alaska Airlines
18 Sep - 25 Sep Turkish Airlines
18 Sep - 03 Oct STARLUX Airlines
11 Sep - 18 Sep Air Premia direct
07 Sep - 14 Sep Air Premia direct
18 Sep - 25 Sep Air Premia direct
02 Sep - 02 Oct Air Premia direct
24 Sep - 03 Oct Delta direct
10 Sep - 10 Oct Delta direct
18 Sep - 03 Oct Delta direct

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

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