It is possible to buy ticket at KLIA2 manually at airline ticket counter instead of booking online. Fortunately, some airlines that fly to KLIA2 has a sales office at this venue.
AirAsia Ticket Sales Counter
30, Level 2 , KLIA2 ,64000 Sepang, Selangor
Malindo Air Ticket Sales Counter
AS 1 -1 -61, Terminal klia2, 6400, Sepang
Alternatively you can use our cheap flight locator tool. Do bear in mind that this tool only located the cheapest flights available thus the location that you depart may also start from KLIA or KLIA2