Transferring between Terminal 1 and Terminal 3 at Singapore Changi Airport in 2026 is incredibly efficient and can be done in two primary ways. The most popular method is the complimentary Skytrain, which operates in both the "Public" and "Transit" areas; the journey takes about 4 minutes and runs frequently from 5:00 AM to 2:00 AM. Outside of those hours, a shuttle bus service is provided. Alternatively, for those who enjoy a stroll, T1 and T3 are directly connected via Jewel Changi Airport on Level 2/3. You can walk through the lush canopy of Jewel, passing the HSBC Rain Vortex, to reach the other terminal in about 10–15 minutes. In 2026, the transit area also features high-speed "travellators" (moving walkways), making it possible to navigate the entire "Changi ecosystem" without ever clearing immigration, provided you remain within the airside zones.