About 7 hours.
The driving distance between Phoenix, AZ and Amarillo, TX is approximately 870 miles and takes around 13-14 hours to drive without traffic.
Texas is 800 miles across. Dallas to Phoenix is about 1050 miles
The driving distance between Phoenix AZ and Lubbock TX is about 738 road miles.
The driving distance from Fort Worth, Texas to Phoenix, Arizona is 1,039 miles.
The halfway point between Decatur, Illinois, and Phoenix, Arizona falls in Clarendon, Texas.
The halfway point between Phoenix, Arizona and Dallas, Texas is Eagle Flat, Texas.
Mapquest gives the estimated driving time as 15 hours and 14 minutes.
1,175 miles taking I-10 EAST.
You can make the border in about 400 miles.
Hereford, Texas
Google Maps estimates the driving time as 3 hours and 46 minutes.
The driving distance from Phoenix, Arizona to San Antonia, Texas is 979.13 miles. All the distance, with the exception of 1.83 miles, is on I-10.