Flight Ninoy Aquino International Airport departs from Manila Ninoy Aquino International Airport at 22:00 and arrives at Phnom Penh Phnom Penh International Airport at 23:59.
The flighttime is about 2h 59m. The distance travelled ("as the bird flies"): 1803 Km. So the average speed is roughly 604 Km.
There is an 1 hour time difference between Manila and Phnom Penh