Flight King Abdulaziz International Airport departs from Jeddah King Abdulaziz International Airport at 18:40 and arrives at Riyadh King Khaled International Airport at 20:30.
The flighttime is about 1h 50m. The distance travelled ("as the bird flies"): 880 Km. So the average speed is roughly 480 Km.
The best day to arrive at Jeddah is Monday and it would be best to avoid Friday, as prices are on average 118% higher than on Monday. (Average prices, based on 1322195 datapoints.)
We have a lot more statistics for flights XY 24 and between Jeddah and Riyadh.