Flight Kuala Lumpur International Airport departs from Kuala Lumpur Kuala Lumpur International Airport at 01:30 and arrives at Shenzhen Shenzhen Bao'an International Airport at 05:45.
The flighttime is about 4h 15m. The distance travelled ("as the bird flies"): 1487 Km. So the average speed is roughly 350 Km.