The road distance between the places is 551 miles. This is the distance when the shortest route is chosen. Also it should be noted that various traffic rules like 'one ways' and 'no entries' have Not been considered when calculating this distance.
The driving distance from Phoenix, Arizona to Amarillo, Texas is 705 miles.
See link below.
311 miles
198 miles
400 miles
596 miles
225 miles
353 miles
490 miles
About 430 miles
About 660 miles
749 miles