Flight Kuala Lumpur International Airport departs from Kuala Lumpur Kuala Lumpur International Airport at 04:20 and arrives at Shenzhen Shenzhen Bao'an International Airport at 08:40.
The flighttime is about 4h 20m. The distance travelled ("as the bird flies"): 1487 Km. So the average speed is roughly 343 Km.