Flight Changi Airport departs from Singapore Changi Airport at 09:25 and arrives at Manado Sam Ratulangi International Airport at 13:15.
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 Friday and it would be best to avoid Tuesday, as prices are on average 135.64% higher than on Friday. (Average prices, based on 81958 datapoints.)
We have a lot more statistics for flights SQ 8468 and between Singapore and Manado.