Speed varies from plane to plane but average speed of a plane is five hundred and eighty miles per hour. Jet airlines can fly at the speed of 600 mph. And some others can go at the 2000 mph.It depends from aircraft to aircraft.Small jet planes can travel faster than the large passenger jet planes.The take-off speed varies for every aircraft.The speed of planes depends on its designing, load, height above sea level, temperature and winds. Most jet airplanes take-off at the speed of 150 to 180 miles per hour.he take-off speed varies for every aircraft. The speed of planes depends on its designing, load, height above sea level, temperature and winds. Most jet airplanes take-off at the speed of 150 to 180 miles per hour.