| Harpenden to Sangeorgiu de Mures | 1,171.79 mi (1,885.81 km) |
| Harpenden to Sangeorz-Bai | 1,156.05 mi (1,860.48 km) |
| Harpenden to Sannicolau Mare | 1,026.55 mi (1,652.07 km) |
| Harpenden to Santana | 1,053.62 mi (1,695.64 km) |
| Harpenden to Satu Mare | 1,068.06 mi (1,718.88 km) |
| Harpenden to Scobinti | 1,251.62 mi (2,014.29 km) |
| Harpenden to Scornicesti | 1,243.55 mi (2,001.30 km) |
| Harpenden to Sebes | 1,153.29 mi (1,856.05 km) |
| Harpenden to Seini | 1,086.04 mi (1,747.81 km) |
| Harpenden to Sfantu-Gheorghe | 1,249.80 mi (2,011.37 km) |
| Harpenden to Sibiu | 1,183.36 mi (1,904.43 km) |
| Harpenden to Sighetu Marmatiei | 1,106.90 mi (1,781.38 km) |
| Harpenden to Sighisoara | 1,196.16 mi (1,925.03 km) |
| Harpenden to Simeria | 1,133.61 mi (1,824.36 km) |
| Harpenden to Sinaia | 1,257.30 mi (2,023.42 km) |
