Flight King Abdulaziz International Airport departs from Jeddah King Abdulaziz International Airport at 21:45 and arrives at Singapore Changi Airport at 12:30.
The flighttime is about 9h 45m. The distance travelled ("as the bird flies"): 7126 Km. So the average speed is roughly 731 Km.
There is an 5 hour time difference between Jeddah and Singapore
