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

Return flights

11 Mar - 23 Mar	Hawaiian Airlines
12 Mar - 22 Mar	Cathay Pacific
12 Mar - 23 Mar	Cathay Pacific
17 Mar - 17 Apr	Hawaiian Airlines
11 Mar - 18 Mar	Cathay Pacific
15 Mar - 23 Mar	Cathay Pacific
14 Mar - 21 Mar	Cathay Pacific
07 Mar - 16 Mar	Hawaiian Airlines
07 Mar - 15 Mar	Hawaiian Airlines
01 Mar - 07 Mar	Hawaiian Airlines
01 Mar - 21 Mar	Cathay Pacific
03 Mar - 03 Apr	Air Canada
26 Mar - 11 Apr	Air Canada
15 Mar - 02 Apr	Cathay Pacific
29 Mar - 06 Apr	Korean Air
29 Mar - 05 Apr	Cathay Pacific

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

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 March from $1164

Return flights