AirHint found the following cheapest one-way flights from Seoul (ICN) to Seattle (SEA) in December 2026 (see full year).
One-Way flights
| 06 Dec | Air Canada | ||
| 24 Dec | China Airlines | ||
| 24 Dec | Asiana Airlines | direct | |
| 06 Dec | Asiana Airlines | direct |
Also check the deals for return flights from Seoul to Seattle in December.
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