The average price for connecting flights from Singapore to Auckland is S$1,685. The average price for non-stop flights from Singapore to Auckland is S$1,773. The chart below shows up to date information regarding non-stop flights from Singapore to Auckland.owever, booking a round trip flight can be a simpler process. You can compare round trip and one way flights by using our flight comparison. The average price for one way flights from Singapore to Auckland is S$1,140. The average price for round trip flights from Singapore to Auckland is S$1,590.