The world’s only full double-decker airliner and the world’s largest passenger jet connect cities across the globe. From Dubai to Auckland, London to Singapore, and Seoul to Los Angeles are just a few routes to see this iconic aircraft. However, how fast can this big bird fly? According to the German airline Lufthansa, its cruising speed is 910 kilometers (565 miles) per hour or Mach .85. In a hurry, it can reach top speeds of up to 1,020 kilometers (634 miles) per hour, making it one of the top five fastest aircraft.