Flight Penang International Airport departs from Penang Penang International Airport at 18:00 and arrives at Surabaya Juanda International Airport at 20:00.
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 Penang and Surabaya
