Flight King Khaled International Airport departs from Riyadh King Khaled International Airport at 20:15 and arrives at Jeddah King Abdulaziz International Airport at 22:15.
The flighttime is about 2h 00m. The distance travelled ("as the bird flies"): 880 Km. So the average speed is roughly 440 Km.
The best day to arrive at Riyadh is Sunday and it would be best to avoid Thursday, as prices are on average 151.77% higher than on Sunday. (Average prices, based on 2014639 datapoints.)
We have a lot more statistics for flights XY 29 and between Riyadh and Jeddah.