Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Kuantan to Sydney as you normally would.
Related info for your journey
Useful info, stats and facts about Kuantan to Sydney flights.
These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Kuantan Airport to Sydney Kingsford Smith Airport flight would often be abbreviated as a KUA to SYD flight.