| Harpenden to Sunbury | 27.43 mi (44.14 km) |
| Harpenden to Sunderland | 217.56 mi (350.13 km) |
| Harpenden to Sunninghill | 31.48 mi (50.66 km) |
| Harpenden to Surbiton | 29.33 mi (47.20 km) |
| Harpenden to Sutton | 31.93 mi (51.39 km) |
| Harpenden to Sutton Coldfield | 80.79 mi (130.02 km) |
| Harpenden to Sutton in Ashfield | 98.10 mi (157.87 km) |
| Harpenden to Sutton on Hull | 135.65 mi (218.31 km) |
| Harpenden to Swadlincote | 83.42 mi (134.24 km) |
| Harpenden to Swallownest | 114.28 mi (183.91 km) |
| Harpenden to Swanage | 108.74 mi (175.00 km) |
| Harpenden to Swindon | 63.68 mi (102.49 km) |
| Harpenden to Swinton | 122.25 mi (196.73 km) |
| Harpenden to Swinton | 143.71 mi (231.28 km) |
| Harpenden to Syston | 68.30 mi (109.92 km) |
