Flight Ninoy Aquino International Airport departs from Manila Ninoy Aquino International Airport at 14:50 and arrives at Busan Gimhae International Airport at 19:50.
The flighttime is about 4h 00m. The distance travelled ("as the bird flies"): 1575 Km. So the average speed is roughly 394 Km.
There is an 1 hour time difference between Manila and Busan