Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Palawan to Port Moresby as you normally would.
If you book a flight to Port Moresby from Palawan, you will be flying to Jackson Fld, which is the city’s only airport. Port Moresby Jackson Fld (POM) is located 4.2 km from the center of Port Moresby.