Flight Guangzhou Baiyun International Airport departs from Guangzhou Guangzhou Baiyun International Airport at 17:45 and arrives at Surabaya Juanda International Airport at 22:00.
The flighttime is about 5h 15m. The distance travelled ("as the bird flies"): 1327 Km. So the average speed is roughly 253 Km.
There is an 1 hour time difference between Guangzhou and Surabaya
