Flight Shenzhen Bao'an International Airport departs from Shenzhen Shenzhen Bao'an International Airport at 23:30 and arrives at Haikou Haikou Meilan International Airport at 00:55.
The flighttime is about 1h 25m. The distance travelled ("as the bird flies"): 389 Km. So the average speed is roughly 275 Km.
