Kilometer(s) per hour (or kph) is the SI unit of velocity.
By definition, an object traveling at a speed of one kph for an hour would move one kilometer.
Comparative list of speed Edit
While landing USS Voyager on the surface of a planet from an altitude of 100 kilometers, Tom Paris piloted the ship on a glide trajectory at a speed of 10,000 kph. (VOY: "The 37's")