Flight Juanda International Airport departs from Surabaya Juanda International Airport at 17:30 and arrives at Lombok Lombok International Airport at 19:30.
The flighttime is about 1h 00m. The distance travelled ("as the bird flies"): 392 Km. So the average speed is roughly 392 Km.
There is an 1 hour time difference between Surabaya and Lombok