Flight Ninoy Aquino International Airport departs from Manila Ninoy Aquino International Airport at 15:10 and arrives at Singapore Changi Airport at 18:50.
The flighttime is about 3h 40m. The distance travelled ("as the bird flies"): 1963 Km. So the average speed is roughly 535 Km.
The best day to arrive at Manila is Friday and it would be best to avoid Thursday, as prices are on average 29.15% higher than on Friday. (Average prices, based on 21603992 datapoints.)
This graph shows the distribution of prices found in the past years for this flight. (Average prices, based on 104 datapoints.)
We have a lot more statistics for flights PR 501 and between Manila and Singapore.