Flight Changi Airport departs from Singapore Changi Airport at 11:15 and arrives at Manado Sam Ratulangi International Airport at 15:05.
The flighttime is about 3h 50m. The distance travelled ("as the bird flies"): 2328 Km. So the average speed is roughly 607 Km.
The best day to arrive at Singapore is Monday and it would be best to avoid Friday, as prices are on average 69.45% higher than on Monday. (Average prices, based on 133114 datapoints.)
We have a lot more statistics for flights TR 216 and between Singapore and Manado.