Originally Posted by
Doppy
Well, at least as of a few months ago connections on separate tickets on LCCs out of T4 required a landside connection, aka entering the country. Even though there is an airside bus connection, you weren't allowed to take it unless it was on a single ticket with a participating carrier.
Very annoying.
So I would be careful with connections that include moving between T1/2/3 and T4
To be fair, it has always been the case that you can't do airside connections between flights that involve LCCs, especially if it involves checked baggage. Yet, for a Terminal 4 connection between two AirAsia flights, I am quite sure one should be able to connect airside given that one does not have checked baggage and was able to retrieve a mobile/online boarding pass (assuming -- normal operations).