Cheapest return flights from Washington to Seoul in September from $900

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

01 Sep - 17 Sep Turkish Airlines
11 Sep - 20 Sep Turkish Airlines
23 Sep - 15 Oct Turkish Airlines
17 Sep - 24 Sep Turkish Airlines
01 Sep - 15 Sep Turkish Airlines
02 Sep - 13 Sep Turkish Airlines
12 Sep - 24 Sep Turkish Airlines
17 Sep - 29 Sep Alaska Airlines
10 Sep - 29 Sep Alaska Airlines
18 Sep - 27 Sep Southern Airways Express
16 Sep - 25 Sep Cathay Pacific
19 Sep - 02 Oct Air India
19 Sep - 02 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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