Flight Changi Airport departs from Singapore Changi Airport at 12:00 and arrives at Manila Ninoy Aquino International Airport at 15:45.
The flighttime is about 3h 45m. The distance travelled ("as the bird flies"): 1963 Km. So the average speed is roughly 523 Km.
The best day to arrive at Singapore is Thursday and it would be best to avoid Wednesday, as prices are on average 62.18% higher than on Thursday. (Average prices, based on 8823084 datapoints.)
We have a lot more statistics for flights SQ 912 and between Singapore and Manila.