AirHint found the following cheapest return flights from Seattle (SEA) to Seoul (ICN) in August 2026 (see full year).
Return flights
| 07 Aug - 16 Aug | Asiana Airlines | direct | |
| 19 Aug - 31 Aug | Asiana Airlines | direct | |
| 02 Aug - 09 Aug | Delta | direct | |
| 27 Aug - 09 Sep | Delta | direct | |
| 27 Aug - 14 Sep | Hainan Airlines | ||
| 09 Aug - 16 Aug | Delta | direct |
Also check the deals for one-way flights from Seattle to Seoul in August.
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