There are several airlines that operate frequent flights from Toronto (YYZ) to Chicago (ORD) including

• Air Canada with 213 flights a week
• United Airlines with 173 flights a week
• WestJet with 99 flights a week
• Delta Air Lines with 42 flights a week
• American Airlines with 38 flights a week

The earliest flight leaves Pearson Intl. Airport at 06:30 and arrives at O'Hare Intl. Airport at 07:13. The last flight of the day departs Toronto at 20:55 and arrives at Chicago at 21:42.

The flight distance from Toronto to Chicago is about 703 km, the shortest flight is 01 hours 42 minutes with WestJet.

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