Flight Juanda International Airport departs from Surabaya Juanda International Airport at 19:30 and arrives at Palembang Sultan Mahmud Badaruddin II International Airport at 21:00.
The flighttime is about 1h 30m. The distance travelled ("as the bird flies"): 912 Km. So the average speed is roughly 608 Km.
The best month to arrive at Surabaya is March and the most expensive month to fly is June. (Average prices, based on 871 datapoints.)
We have a lot more statistics for flights QG 721 and between Surabaya and Palembang.