Flight Tan Son Nhat International Airport departs from Ho Chi Minh City Tan Son Nhat International Airport at 00:25 and arrives at Taipei Taoyuan International Airport at 04:55.
The flighttime is about 3h 30m. The distance travelled ("as the bird flies"): 1734 Km. So the average speed is roughly 495 Km.
There is an 1 hour time difference between Ho Chi Minh City and Taipei