It requires a driving time of about 19 hours and 11 minutes according to MapQuest.
Phoenix, AZ to Oklahoma City, OK is 953 driving miles using I-40 East.
It is 218 miles.
MapQuest estimates the driving time as 19 hours and 14 minutes.
The shortest driving time is 20 hours and 24 minutes.
Oklahoma City to Dallas is 1,087,680 feet.
MapQuest estimates the driving time as 13 hours and 21 minutes.
The driving distance between Jonesboro, Arkansas and Oklahoma City, Oklahoma is 437 miles via I-40 per MapQuest. The driving time per MapQuest is 6 hours and 40 minutes.
Elk City, Oklahoma
Assuming that you are driving, the halfway point is right around Elk City, Oklahoma. The closest cities to the halfway point are Oklahoma City, Oklahoma and Amarillo, Texas.
It is 256.56 miles according to MapQuest.
It's about 6 hours if you stay at it.
It is 1,327 miles according to Google Maps.