Flight Changi Airport departs from Singapore Changi Airport at 05:25 and arrives at Tiruchirapalli International Airport at 07:10.
The flighttime is about 4h 15m. The distance travelled ("as the bird flies"): 2801 Km. So the average speed is roughly 659 Km.
There is an 2.5 hour time difference between Singapore and Tiruchirapalli