Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Johor Bahru to Christchurch as you normally would.
JHB and CHC are unique codes to identify airports used in the aviation industry. They are defined by IATA (International Air Transport Association) and are commonly called IATA codes. JHB to CHC refers to a flight route from Johor Bahru Sultan Ismail Intl Airport to Christchurch Airport.