Flight Changi Airport departs from Singapore Changi Airport at 14:30 and arrives at Manila Ninoy Aquino International Airport at 18:25.
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 Saturday and it would be best to avoid Thursday, as prices are on average 202.89% higher than on Saturday. (Average prices, based on 8738742 datapoints.)
We have a lot more statistics for flights PR 508 and between Singapore and Manila.