Hi, I travelled last Dec on AirAsia (KL-SIN) SGD$30+, inclusive of the ferry coach (booked online @ RM$5) from KL Sentral station to LCCT.
My 2nd travel this month via Tiger Airways cost me SGD$60 (2-way, without check-in luggage). And the coach fare to/fro KL Sentral station to LCCT costs...