| Swansea to Sudbury | 4,212.12 mi (6,778.75 km) |
| Swansea to Sunbury | 4,186.91 mi (6,738.19 km) |
| Swansea to Sunderland | 4,049.55 mi (6,517.13 km) |
| Swansea to Sunninghill | 4,178.60 mi (6,724.80 km) |
| Swansea to Surbiton | 4,192.32 mi (6,746.89 km) |
| Swansea to Sutton | 4,197.47 mi (6,755.18 km) |
| Swansea to Sutton Coldfield | 4,099.40 mi (6,597.34 km) |
| Swansea to Sutton in Ashfield | 4,104.44 mi (6,605.46 km) |
| Swansea to Sutton on Hull | 4,121.10 mi (6,632.26 km) |
| Swansea to Swadlincote | 4,103.39 mi (6,603.77 km) |
| Swansea to Swallownest | 4,095.20 mi (6,590.58 km) |
| Swansea to Swanage | 4,151.42 mi (6,681.07 km) |
| Swansea to Swindon | 4,130.24 mi (6,646.98 km) |
| Swansea to Swinton | 4,091.98 mi (6,585.41 km) |
| Swansea to Swinton | 4,052.80 mi (6,522.36 km) |
