Flight Changi Airport departs from Singapore Changi Airport at 07:35 and arrives at Yogyakarta Yogyakarta International Airport at 09:00.
The flighttime is about 2h 25m. The distance travelled ("as the bird flies"): 0 Km. So the average speed is roughly 0 Km.
There is an 1 hour time difference between Singapore and Yogyakarta