Flight Heathrow Airport departs from London Heathrow Airport at 20:10 and arrives at Jeddah King Abdulaziz International Airport at 05:30.
The flighttime is about 7h 20m. The distance travelled ("as the bird flies"): 5348 Km. So the average speed is roughly 729 Km.
There is an 2 hour time difference between London and Jeddah