There are several airlines that operate frequent flights from Seoul (ICN) to Seattle (SEA) including

• Korean Air with 60 flights a week
• Asiana Airlines with 48 flights a week
• United Airlines with 29 flights a week
• China Southern Airlines with 27 flights a week
• Delta Air Lines with 22 flights a week

The earliest flight leaves Incheon Intl. Airport at 17:55 and arrives at Seattle Tacoma Intl. Airport at 11:05. The last flight of the day departs Seoul at 19:20 and arrives at Seattle at 13:38.

The flight distance from Seoul to Seattle is about 8418 km, the shortest flight is 09 hours 40 minutes with United Airlines."

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