Here are some transportation options:
i) ERL-LRT-BRT
Take the ERL from the airport to KL Sentral. From KL Sentral, transit to the LRT and choose USJ 7 Station as your destination. At USJ 7, transit to the BRT and choose Sunway Lagoon as your destination. From BRT Sunway Lagoon, Sunway Pyramid is just a walking distance away. Simply follow the signage and pathfinders upon your arrival.
Approximate travelling time: 1 hour 30 mins
From ERL KLIA – LRT KL Sentral (Approx. 35mins)
From LRT KL Sentral – LRT/BRT USJ 7 (Approx. 40mins)
From LRT/BRT USJ 7 – BRT Sunway Lagoon (Approx 10mins)
ii) Grab or Airport Taxi
You may also opt for alternative modes of transportation. It will save you the hassle of changing from one station to another and the price is cheaper for a group of four travellers.
Approximate travelling time: 45mins to 1 hour depending on the traffic condition