| Willebroek to Sangeorz-Bai | 948.23 mi (1,526.02 km) |
| Willebroek to Sannicolau Mare | 817.00 mi (1,314.84 km) |
| Willebroek to Santana | 843.91 mi (1,358.15 km) |
| Willebroek to Satu Mare | 860.06 mi (1,384.13 km) |
| Willebroek to Scobinti | 1,045.08 mi (1,681.90 km) |
| Willebroek to Scornicesti | 1,033.92 mi (1,663.93 km) |
| Willebroek to Sebes | 943.66 mi (1,518.68 km) |
| Willebroek to Seini | 878.16 mi (1,413.26 km) |
| Willebroek to Sfantu-Gheorghe | 1,040.60 mi (1,674.68 km) |
| Willebroek to Sibiu | 973.74 mi (1,567.09 km) |
| Willebroek to Sighetu Marmatiei | 899.71 mi (1,447.94 km) |
| Willebroek to Sighisoara | 986.94 mi (1,588.32 km) |
| Willebroek to Simeria | 923.90 mi (1,486.88 km) |
| Willebroek to Sinaia | 1,047.73 mi (1,686.16 km) |
| Willebroek to Slatina | 1,031.56 mi (1,660.13 km) |
