Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Borneo to Johannesburg as you normally would.
Related info for your journey
Useful info, stats and facts about Borneo to Johannesburg 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 Johannesburg OR Tambo Airport flight would often be abbreviated as a BKI to JNB flight. Johannesburg Lanseria Airport (HLA), Pretoria Wonderboom Apt. Airport (PRY), Sun City Resort Pilansberg Airport (NTY) are some additional IATA codes for airports related to your trip.