You can travel between Terminals 1, 2, and 3 via the complimentary Skytrain service in the transit area. If you're in the public area, you can go to and from Terminals 1 and 3 via the Skytrain. Take note that the Skytrain operates from 4:30am until 1:30am.

In 2026, the most efficient way to travel between Terminal 1 and Terminal 2 at Singapore Changi Airport is via the automated Skytrain. This complimentary service operates both in the "Transit" (airside) and "Public" (landside) areas, with a journey time of approximately four minutes. For those who prefer to walk and enjoy the airport's lush environment, there are clearly marked inter-terminal pedestrian walkways equipped with travelators; this walk typically takes 10 to 15 minutes. Additionally, there are 24-hour shuttle buses available for specific transit routes. For travelers with heavy luggage, the Skytrain remains the gold standard, though it is worth noting that the Skytrain occasionally undergoes maintenance during late-night hours (typically 2:00 AM to 5:00 AM), during which time the shuttle buses or walking become the primary alternatives. The signage is exceptionally clear, using universal icons to guide you through one of the world's most navigable transport hubs.