Flight Changi Airport departs from Singapore Changi Airport at 08:20 and arrives at Yogyakarta Adisutjipto International Airport at 09:35.
The flighttime is about 2h 15m. The distance travelled ("as the bird flies"): 775 Km. So the average speed is roughly 344 Km.
There is an 1 hour time difference between Singapore and Yogyakarta
The best day to arrive at Singapore is Wednesday and it would be best to avoid Monday, as prices are on average 76.35% higher than on Wednesday. (Average prices, based on 407008 datapoints.)
We have a lot more statistics for flights TR 212 and between Singapore and Yogyakarta.