How much gas from Dallas to phoenix?

The distance from Dallas, Texas to Phoenix, Arizona is approximately 1,137 miles. Assuming you are driving a car that gets 25 miles per gallon, you would need approximately 45.48 gallons of gas to make the trip. At an average gas price of $3.00 per gallon, it would cost approximately $136.44 to fill up your car and make the drive from Dallas to Phoenix.