Cheapest one-way flights from Seattle to Seoul in May from $353

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

One-Way flights

07 May Cathay Pacific
04 May Cathay Pacific
17 May Philippine Airlines
18 May Asiana Airlines direct
20 May Asiana Airlines direct
15 May Asiana Airlines direct
14 May Philippine Airlines
04 May Asiana Airlines direct
13 May Asiana Airlines direct
10 May Philippine Airlines

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

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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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