Take bus 24, 27, 34, 36, 53, 110, or 858 to Changi Airport T2 basement bus stop. Take the lift to level 1 and take the T4 shuttle bus (from the bus stop located beside the T2 multi-storey carpark). The T4 shuttle bus runs round the clock. This service between T2 and T4 is complimentary (free of charge).
Step by step details.
