Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Palawan to Bali as you normally would.
These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Puerto Princesa Airport to Denpasar Bali Ngurah Rai Airport flight would often be abbreviated as a PPS to DPS flight. Ready for more IATA code knowledge? These are related airports for your current travel destination: El Nido Airport (ENI), Busuanga Airport (USU), San Vicente Airport (SWL).