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

Return flights

01 Mar - 21 Mar	Air Canada
16 Mar - 20 Mar	Air Canada
07 Mar - 09 Mar	Air Canada
07 Mar - 15 Mar	Air Canada
07 Mar - 18 Mar	Air Canada
21 Mar - 25 Mar	Air Canada
15 Mar - 21 Mar	Air Canada
14 Mar - 21 Mar	Air Canada
14 Mar - 22 Mar	Air Canada
22 Mar - 24 Mar	Air Canada
12 Mar - 21 Apr	Air Canada
20 Mar - 17 Apr	Air Canada
09 Mar - 13 Apr	Air Canada
23 Mar - 06 Apr	Air Canada
10 Mar - 07 Apr	Air Canada
07 Mar - 18 Apr	Air Canada
05 Mar - 15 Apr	Air Canada
23 Mar - 11 Apr	Air Canada
26 Mar - 11 Apr	United
25 Mar - 01 Apr	American Airlines

Also check the deals for one-way flights from Seoul to Seattle 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 Seoul to Seattle in March from $552

Return flights