| Middlesex to Sudbury | 3,510.33 mi (5,649.32 km) |
| Middlesex to Sunbury | 3,477.13 mi (5,595.90 km) |
| Middlesex to Sunderland | 3,370.16 mi (5,423.75 km) |
| Middlesex to Sunninghill | 3,468.12 mi (5,581.41 km) |
| Middlesex to Surbiton | 3,482.55 mi (5,604.62 km) |
| Middlesex to Sutton | 3,487.70 mi (5,612.91 km) |
| Middlesex to Sutton Coldfield | 3,396.74 mi (5,466.53 km) |
| Middlesex to Sutton in Ashfield | 3,408.14 mi (5,484.87 km) |
| Middlesex to Sutton on Hull | 3,432.98 mi (5,524.85 km) |
| Middlesex to Swadlincote | 3,403.22 mi (5,476.96 km) |
| Middlesex to Swallownest | 3,400.98 mi (5,473.35 km) |
| Middlesex to Swanage | 3,431.33 mi (5,522.20 km) |
| Middlesex to Swindon | 3,418.71 mi (5,501.88 km) |
| Middlesex to Swinton | 3,398.97 mi (5,470.11 km) |
| Middlesex to Swinton | 3,357.92 mi (5,404.05 km) |
