Flight Wattay International Airport departs from Vientiane Wattay International Airport at 13:10 and arrives at Guangzhou Guangzhou Baiyun International Airport at 16:10.
The flighttime is about 2h 00m. The distance travelled ("as the bird flies"): 1207 Km. So the average speed is roughly 604 Km.
There is an 1 hour time difference between Vientiane and Guangzhou