Flight Changi Airport departs from Singapore Changi Airport at 10:55 and arrives at Pekanbaru Sultan Syarif Kasim II International Airport at 11:00.
The flighttime is about 1h 05m. The distance travelled ("as the bird flies"): 283 Km. So the average speed is roughly 261 Km.
There is an 1 hour time difference between Singapore and Pekanbaru