There are several airlines that operate frequent flights from Phoenix (PHX) to Houston (IAH) including

• American Airlines with 194 flights a week
• United Airlines with 60 flights a week
• Qantas Airways with 11 flights a week
• with 5 flights a week
• with 5 flights a week

The earliest flight leaves Sky Harbor Intl. Airport at 05:00 and arrives at George Bush Intercontinental Airport at 02:20. The last flight of the day departs Phoenix at 23:50 and arrives at Houston at 23:29.

The flight distance from Phoenix to Houston is about 1630 km, the shortest flight is 02 hours 26 minutes with United Airlines.

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