Determine the distance you will be traveling.
Determine the average speed that the car will travel at. If most of the traveling is done on highways, look at the most common speed limits on that highway for a good estimate on how fast you can drive.
Divide the total distance to be traveled by the car's speed to get travel time. For example, if a car needs to travel 100 miles, and is traveling at 65 mph, you would divide 100 by 65 to get 1.54 hours.
