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

Return flights

03 Mar - 24 Mar	Hawaiian Airlines
04 Mar - 11 Mar	Frontier Airlines
03 Mar - 10 Mar	Alaska Airlines
19 Mar - 12 Apr	Frontier Airlines
05 Mar - 13 Mar	Frontier Airlines
01 Mar - 04 Mar	Hawaiian Airlines
11 Mar - 23 Mar	Frontier Airlines
19 Mar - 29 Mar	Frontier Airlines
04 Mar - 24 Mar	Alaska Airlines
31 Mar - 06 Apr	Air Canada
02 Mar - 09 Mar	Air Canada
18 Mar - 25 Mar	Alaska Airlines
30 Mar - 10 Apr	Air Canada
27 Mar - 03 Apr	Air Canada
28 Mar - 04 Apr	Air Canada
29 Mar - 08 Apr	Asiana Airlines
30 Mar - 08 Apr	Asiana Airlines
16 Mar - 17 Apr	Cathay Pacific
22 Mar - 03 Apr	Asiana Airlines
29 Mar - 10 Apr	Asiana Airlines

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 $1020

Return flights