Flight King Khaled International Airport departs from Riyadh King Khaled International Airport at 18:45 and arrives at Najran Nejran Airport at 20:30.
The flighttime is about 4h 45m. The distance travelled ("as the bird flies"): 625 Km. So the average speed is roughly 132 Km.
There is an 3 hour time difference between Riyadh and Najran
