Passenger terminals[edit]
Changi Airport currently has three terminals, T1, T2, and T3, with a total annual handling capacity of 66 million. Terminals 1, 2, and 3 are directly connected via a monorail people mover system, with airside passengers being able to freely move between the terminals without going through immigration. Transport within and between these three terminals is also provided by people movers and the skytrain system, although it is also possible to walk between the terminals on foot for landside visitors.
A former Budget Terminal, capable of handling 7 million passenger per year, was purpose-built for low-cost carriers. It was physically separated from the main terminals towards the south, where connections were possible via a free shuttle bus service to and from Terminal 2. Demolition began in 2013 to make way for a new and bigger Terminal 4, designed to cater mainly to budget carriers and regional airlines that operate single-aisle aircraft.[33][34]