Cheapest return DCA–ICN flights, September

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

Return flights

23 Sep - 09 Oct Air Canada
01 Sep - 13 Sep Frontier Airlines
30 Sep - 10 Oct Air Canada
19 Sep - 11 Oct Air Canada
27 Sep - 10 Oct Air Canada
02 Sep - 16 Sep Air Canada
16 Sep - 21 Sep Air Canada
13 Sep - 21 Sep Air Canada
12 Sep - 23 Sep Air Canada
12 Sep - 18 Sep Air Canada
04 Sep - 12 Sep Air Canada
11 Sep - 18 Sep Air Canada
18 Sep - 26 Sep Air Canada
07 Sep - 27 Sep Emirates
25 Sep - 11 Oct Emirates

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

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