Flight Changi Airport departs from Singapore Changi Airport at 13:05 and arrives at Hanoi Noi Bai International Airport at 23:10.The flight has a short stop at Ho Chi Minh City. The flighttime is about 11h 05m. The distance travelled ("as the bird flies"): 599 Km. So the average speed is roughly 54 Km. There is an 1 hour time difference between Singapore and Hanoi