Flight London Gatwick Airport departs from London London Gatwick Airport at 10:20 and arrives at Islamabad Benazir Bhutto International Airport at 22:20.
The flighttime is about 8h 00m. The distance travelled ("as the bird flies"): 8239 Km. So the average speed is roughly 1030 Km.
There is an 4 hour time difference between London and Islamabad