| Upminster to Sangeorgiu de Mures | 1,143.63 mi (1,840.49 km) |
| Upminster to Sangeorz-Bai | 1,128.62 mi (1,816.34 km) |
| Upminster to Sannicolau Mare | 997.00 mi (1,604.52 km) |
| Upminster to Santana | 1,024.51 mi (1,648.79 km) |
| Upminster to Satu Mare | 1,040.53 mi (1,674.57 km) |
| Upminster to Scobinti | 1,224.79 mi (1,971.12 km) |
| Upminster to Scornicesti | 1,214.11 mi (1,953.93 km) |
| Upminster to Sebes | 1,124.47 mi (1,809.65 km) |
| Upminster to Seini | 1,058.57 mi (1,703.61 km) |
| Upminster to Sfantu-Gheorghe | 1,221.49 mi (1,965.80 km) |
| Upminster to Sibiu | 1,154.57 mi (1,858.09 km) |
| Upminster to Sighetu Marmatiei | 1,079.77 mi (1,737.72 km) |
| Upminster to Sighisoara | 1,167.83 mi (1,879.45 km) |
| Upminster to Simeria | 1,104.55 mi (1,777.61 km) |
| Upminster to Sinaia | 1,228.58 mi (1,977.21 km) |
