Cheapest return flights from Washington to Seoul in September from $1089

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

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

Return flights

02 Sep - 16 Sep Air Canada
16 Sep - 14 Oct Air Canada
21 Sep - 29 Sep Cathay Pacific
07 Sep - 21 Sep Air Canada
12 Sep - 21 Sep Air Canada
08 Sep - 19 Sep Air Canada
23 Sep - 30 Sep Alaska Airlines
05 Sep - 20 Sep jetBlue
26 Sep - 17 Oct Cathay Pacific
01 Sep - 19 Sep Air Canada

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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