Did not know KL has 2 International Airports, but very close and well connected by Express Train. 2 is smaller. When a lot of time you can take this train downtown, but make sure you have enougj time for checkin. As my flights were not connected, I had to collect my luggage in KL and check in again. Can be done 4 hours before DEP with Air Asia. All easy and relaxed, even immigration.