There are several airlines that operate frequent flights from Chicago (ORD) to Seoul (ICN) including

• United Airlines with 189 flights a week
• American Airlines with 129 flights a week
• Delta Air Lines with 86 flights a week
• Air Canada with 48 flights a week
• Korean Air with 35 flights a week

The earliest flight leaves O'Hare Intl. Airport at 11:30 and arrives at Incheon Intl. Airport at 04:00. The last flight of the day departs Chicago at 23:55 and arrives at Seoul at 16:30.

The flight distance from Chicago to Seoul is about 10576 km, the shortest flight is 13 hours 50 minutes with WestJet.

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