Walking between Terminal 1 and Terminal 3 at Changi Airport typically takes 10 to 15 minutes if you use the direct pedestrian link bridges. In the public (landside) area, you must walk through Jewel Changi Airport, which connects T1 directly to the link bridges for T2 and T3. In the transit (airside) area, travelers are encouraged to use the complimentary Skytrain, which connects the terminals in just about 4 minutes. If you choose to walk in the transit area to get some exercise, the journey is longer—roughly 15 to 20 minutes—as you navigate through the expansive duty-free zones and moving walkways. For most 2026 travelers, the Skytrain is the preferred method for speed, but the walk through Jewel is highly recommended for those who want to see the "HSBC Rain Vortex" waterfall without clearing immigration, as the train between T2 and T3 passes right by it.