Flight Changi Airport departs from Singapore Changi Airport at 18:25 and arrives at Ho Chi Minh City Tan Son Nhat International Airport at 19:55.
The flighttime is about 2h 30m. The distance travelled ("as the bird flies"): 405 Km. So the average speed is roughly 162 Km.
There is an 1 hour time difference between Singapore and Ho Chi Minh City
The best month to arrive at Singapore is September and the most expensive month to fly is March. (Average prices, based on 420 datapoints.)
We have a lot more statistics for flights NH 654 and between Singapore and Ho Chi Minh City.