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

Return flights

30 Apr - 11 May	Air Canada
01 Apr - 06 Apr	Air Canada
03 Apr - 08 Apr	Air Canada
15 Apr - 14 May	Air Canada
07 Apr - 20 Apr	Air Canada
17 Apr - 16 May	Air Canada
16 Apr - 16 May	Air Canada
15 Apr - 01 May	Air Canada
24 Apr - 23 May	Air Canada
24 Apr - 03 May	Air Canada
14 Apr - 27 Apr	Air Canada
24 Apr - 15 May	Air Canada
24 Apr - 08 May	Air Canada
15 Apr - 19 Apr	Air Canada
19 Apr - 26 Apr	Air Canada
14 Apr - 25 Apr	Air Canada
07 Apr - 14 Apr	Air Canada
07 Apr - 19 Apr	Air Canada
25 Apr - 02 May	Air Canada
23 Apr - 30 Apr	Air Canada

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

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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Cheapest return flights from Washington to Seoul in April from $1044

Return flights