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