There are several airlines that operate frequent flights from Chicago (ORD) to Dublin (DUB) including

• United Airlines with 163 flights a week
• American Airlines with 131 flights a week
• British Airways with 95 flights a week
• Delta Air Lines with 68 flights a week
• Lufthansa Cargo with 58 flights a week

The earliest flight leaves O'Hare Intl. Airport at 15:50 and arrives at Dublin Airport at 05:15. The last flight of the day departs Chicago at 21:30 and arrives at Dublin at 09:50.

The flight distance from Chicago to Dublin is about 5926 km, the shortest flight is 07 hours 15 minutes with .

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