Flight Haikou Meilan International Airport departs from Haikou Haikou Meilan International Airport at 23:00 and arrives at Bangkok Suvarnabhumi Airport at 00:20.
The flighttime is about 2h 20m. The distance travelled ("as the bird flies"): 1094 Km. So the average speed is roughly 469 Km.
There is an 1 hour time difference between Haikou and Bangkok