Flight Changi Airport departs from Singapore Changi Airport at 19:50 and arrives at Manila Ninoy Aquino International Airport at 23:45.
The flighttime is about 3h 55m. The distance travelled ("as the bird flies"): 1963 Km. So the average speed is roughly 501 Km.
The best day to arrive at Singapore is Monday and it would be best to avoid Friday, as prices are on average 44.55% higher than on Monday. (Average prices, based on 8739461 datapoints.)
We have a lot more statistics for flights PR 512 and between Singapore and Manila.