Phoenix to Dallas is 1,068 miles. Via the northern route, Albuquerque, New Mexico is an excellent choice with things to do, excellent dining choices and accomodations in every price range. It is only 419 miles from Phooenix, however. The next wide spot in the road worthy of pulling in at might be Tucumcari which is a might shy on amenities and is about 60 miles past the geographic midpoint for that trip (592 miles from Phoenix). If the southern route using Interstate 10 is your choice, consider El Paso located 430 miles from Phoenix. The northern route is longer, but has many interesting attractions.
castle rock is about half-way between denver and Colorado springs its right off I-25 and easy to get to both places.
Grand junction
Amarillo
Dalhart, TX
Hays, KS
Channing TX
The halfway point between Phoenix, Arizona and Dallas, Texas is Eagle Flat, Texas.
demming
Monrose, Ca
Amarillo, TX
Elk City, OK
Shady Grove, Louisiana is halfway between Fort Hood & Phoenix City
Banner, Oklahoma.
Stotts City MO
Little Rock, Arkansas
Oklahoma City is a halfway point between Ironton, Ohio and Phoenix, AZ.
Wills Point
knoxville,tenn