It is very frequent that we travel on short-haul flight via AirAsia, Firefly, Malindo and other low-cost carrier that have an established network around this region.
In Malaysia, low-cost airlines mostly landed at KLIA2 while full-service airlines landed at KLIA.
The travelling time became a concern when we need to transit between the two airports, which is so near yet so far.
I was travelling from Penang to KLIA2 and departed to Japan from KLIA.
Let's see my actual travelling time in this transit.
14:55 Landed and walked into KLIA2 terminal.
15:05 Arrive at KLIA Ekspres and KLIA Transit platform. (Same place for both)
15:15 Next train
15:27 Reach KLIA Departure Hall
Total 32 minutes without collecting check-in baggage from KLIA2. Please spare some time if you have luggage to collect and 5 more minutes to travel within KLIA as KLIA have two terminals depends which Gate you are assigned to.
Fee: RM2 (Touch n' Go available for use but I don't recommend it because system was down when I arrived at KLIA, end up taking more time to reissue ticket, or probably I was unlucky. )