Flight Juanda International Airport departs from Surabaya Juanda International Airport at 06:00 and arrives at Penang Penang International Airport at 10:00.
The flighttime is about 3h 00m. The distance travelled ("as the bird flies"): 1439 Km. So the average speed is roughly 480 Km.
There is an 1 hour time difference between Surabaya and Penang
The best day to arrive at Surabaya is Wednesday and it would be best to avoid Sunday, as prices are on average 101.3% higher than on Wednesday. (Average prices, based on 652838 datapoints.)
This graph shows the distribution of prices found in the past years for this flight. (Average prices, based on 316 datapoints.)
We have a lot more statistics for flights QZ 386 and between Surabaya and Penang.