Cheapest one-way flights from Seattle to Seoul in April from $420

AirHint found the following cheapest one-way flights from Seattle (SEA) to Seoul (ICN) in April 2026 (see full year).

One-Way flights

03 Apr Asiana Airlines direct
04 Apr Asiana Airlines direct
01 Apr Asiana Airlines direct
21 Apr Asiana Airlines direct
27 Apr Asiana Airlines direct
24 Apr Asiana Airlines direct
09 Apr Hawaiian Airlines direct
30 Apr United
30 Apr Korean Air direct

Also check the deals for return flights from Seattle to Seoul in April.

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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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