AirHint found the following cheapest one-way flights from Seattle (SEA) to Seoul (ICN) in May 2026 (see full year).
One-Way flights
| 08 May | Asiana Airlines | direct | |
| 09 May | Asiana Airlines | direct | |
| 27 May | Asiana Airlines | direct | |
| 25 May | Delta | ||
| 25 May | Korean Air | direct |
Also check the deals for return flights from Seattle to Seoul in May.
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