For what it's worth, from my house to I-40 at Ashfork, on 89, in a car, takes just over 1 hour. Probably a little less from Prescott, and a little more from Jerome.(I would strongly recommend the ride through Jerome from the Verde Valley to 89.)
From Ashfork to Kingman takes about 1 1/2 hours, on the Interstate, cruising at 80. Kay, any idea of how long it takes from Seligman to Kingman on rt 66, at a comfortable pace?