Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Palawan to Sri Lanka as you normally would.
PPS stands for Puerto Princesa Airport, while CMB stands for Colombo Bandaranaike Intl Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry. Ready for more IATA code knowledge? These are related airports for your current travel destination: Trincomalee China Bay Airport (TRR), Hatton Castlereigh Reservoir Airport (NUF), Colombo Diyawanna Oya Seaplane Base Airport (DWO), Hambantota Mattala Rajapaksa Int'l Airport (HRI), Bentota River Airport (BJT).