The most frequent bus route to klia2 is from KL Sentral, with AeroBus and SkyBus buses serving the route. And with a flight to catch, not wanting to risk missing it and not pay RM55, I opted to go to the airport by this method.
You might be thinking that both the AeroBus and SkyBus serves klia2 as competitors. Well, it’s true during the LCCT era, but they’ve merged some time ago and now operate as AeroSky Ventures for the klia2 – KL Sentral route, with tickets purchased from AeroBus or SkyBus valid for use on either company’s buses. Note that this applies for the klia2 – KL Sentral route only and not other routes still operating under the distinct AeroBus or SkyBus names.