How many mileshours is the drive from Houston TX to Flagstaff AZ?

The driving distance between Flagstaff, AZ and Houston, TX is approximately 1210 miles. The driving time would be approximately 19 hours 45 minutes if you were to travel non-stop in good driving conditions. (The driving time does not take into consideration conditions which may extend trip time such as weather, road work, border crossings and rush hour traffic in urban areas.)