My daughter plays travel softball. So every weekend in summer we are gone somewhere. When we speak of how far it is to XYZ city where they will be playing, we speak in terms of "hours". 5 hrs, 8 hrs, 10.5 hrs, 15 hrs, etc. NEVER does anyone say "its 547 miles" The distance is irrelevant, and speed is about same, 60-65mph avg including stops, for most people.
When we plan hiking trip distances, I think and talk in terms of "days" on the trail. 3day, 4 day, 5 day, etc. Mainly because the food and fuel we carry is oriented around days, not miles. However, you have to know what kind of mileage you expect to make to plan that. When you travel point to point, that day may be 8 hrs, or may be 12 hrs, depending, but if you want to stay on schedule, you have to keep moving till you get there.