Cheapest return flights from Washington to Seoul in September from $986

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

10 Sep - 30 Sep Air Canada
18 Sep - 23 Sep Air Canada
09 Sep - 29 Oct Air Canada
01 Sep - 01 Oct Air Canada
09 Sep - 23 Sep Cathay Pacific
28 Sep - 12 Oct Cathay Pacific
01 Sep - 26 Sep Air Canada
06 Sep - 24 Sep Cathay Pacific
25 Sep - 05 Oct Air Canada
29 Sep - 12 Oct Air Canada
29 Sep - 23 Oct Cathay Pacific
01 Sep - 30 Sep Cathay Pacific
15 Sep - 01 Oct Cathay Pacific

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.

Book a cheap hotel in Seoul

Cheap car rent in Seoul