There are several airlines that operate frequent flights from Calgary (YYC) to Houston (IAH) including

• United Airlines with 76 flights a week
• Air Canada with 75 flights a week
• WestJet with 67 flights a week
• Delta Air Lines with 33 flights a week
• American Airlines with 28 flights a week

The earliest flight leaves Calgary Intl. Airport at 06:00 and arrives at George Bush Intercontinental Airport at 00:05. The last flight of the day departs Calgary at 19:15 and arrives at Houston at 23:52.

The flight distance from Calgary to Houston is about 2827 km, the shortest flight is 03 hours 50 minutes with WestJet.

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