There are several airlines that operate frequent flights from Seoul (ICN) to San Francisco (SFO) including

• Korean Air with 150 flights a week
• Asiana Airlines with 141 flights a week
• United Airlines with 56 flights a week
• China Southern Airlines with 48 flights a week
• China Eastern Airlines with 46 flights a week

The earliest flight leaves Incheon Intl. Airport at 16:00 and arrives at San Francisco Intl. Airport at 09:30. The last flight of the day departs Seoul at 20:00 and arrives at San Francisco at 15:00.

The flight distance from Seoul to San Francisco is about 9134 km, the shortest flight is 10 hours 15 minutes with United Airlines."

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