| Merthyr Tudful to Sunbury | 128.73 mi (207.17 km) |
| Merthyr Tudful to Sunderland | 233.54 mi (375.85 km) |
| Merthyr Tudful to Sunninghill | 119.27 mi (191.95 km) |
| Merthyr Tudful to Surbiton | 134.07 mi (215.76 km) |
| Merthyr Tudful to Sutton | 139.14 mi (223.92 km) |
| Merthyr Tudful to Sutton Coldfield | 86.95 mi (139.93 km) |
| Merthyr Tudful to Sutton in Ashfield | 130.64 mi (210.25 km) |
| Merthyr Tudful to Sutton on Hull | 190.57 mi (306.70 km) |
| Merthyr Tudful to Swadlincote | 104.90 mi (168.82 km) |
| Merthyr Tudful to Swallownest | 141.25 mi (227.32 km) |
| Merthyr Tudful to Swanage | 99.61 mi (160.30 km) |
| Merthyr Tudful to Swindon | 69.66 mi (112.11 km) |
| Merthyr Tudful to Swinton | 148.39 mi (238.80 km) |
| Merthyr Tudful to Swinton | 129.74 mi (208.80 km) |
| Merthyr Tudful to Syston | 117.61 mi (189.27 km) |
