
To ensure you get the cheapest price possible for a flight from South Island, you should look to book at least 15 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
Currently, March is the cheapest month in which you can book a flight from South Island (average of $353). Flying from South Island in February will prove the most costly (average of $719). There are multiple factors that influence the price of a flight so comparing airlines, departure airports and times can help keep costs down.