Flight Guangzhou Baiyun International Airport departs from Guangzhou Guangzhou Baiyun International Airport at 17:10 and arrives at Vientiane Wattay International Airport at 18:40.
The flighttime is about 2h 30m. The distance travelled ("as the bird flies"): 1207 Km. So the average speed is roughly 483 Km.
There is an 1 hour time difference between Guangzhou and Vientiane
