The Concorde flies faster and higher than most commercial jets. For example, a Boeing 747 aircraft cruises at about 560 mph (901 kph, or Mach 0.84) at an altitude of 35,000 ft (10,675 m). In contrast, the Concorde cruises at 1,350 mph (2,172 kph, or Mach 2) at an altitude of 60,000 ft (18,300 m). Because the Concorde travels faster than the speed of sound and almost twice as high as other commercial jets, it has several features that set it apart from other aircraft: