Cheapest return flights from Washington to Seoul in April from $997

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

Return flights

28 Apr - 20 May Frontier Airlines
28 Apr - 01 May Frontier Airlines
26 Apr - 10 May Frontier Airlines
24 Apr - 08 May Frontier Airlines
27 Apr - 20 May Frontier Airlines
14 Apr - 25 Apr Air Canada
07 Apr - 20 Apr Hawaiian Airlines
16 Apr - 29 Apr Air Canada
22 Apr - 29 Apr Air Canada
07 Apr - 14 Apr Air Canada
19 Apr - 27 Apr Air Canada
16 Apr - 13 May Air Canada
22 Apr - 30 Apr Air Canada
05 Apr - 13 Apr Air Canada
06 Apr - 04 May Air Canada
29 Apr - 20 May Air Canada
19 Apr - 25 Apr Frontier Airlines
30 Apr - 04 May Air Canada
07 Apr - 27 Apr Air Canada
13 Apr - 06 May Air Canada

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

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