| Ostend to Sangeorz-Bai | 1,011.84 mi (1,628.40 km) |
| Ostend to Sannicolau Mare | 880.09 mi (1,416.36 km) |
| Ostend to Santana | 907.32 mi (1,460.20 km) |
| Ostend to Satu Mare | 923.69 mi (1,486.54 km) |
| Ostend to Scobinti | 1,108.52 mi (1,783.99 km) |
| Ostend to Scornicesti | 1,097.11 mi (1,765.63 km) |
| Ostend to Sebes | 1,007.21 mi (1,620.95 km) |
| Ostend to Seini | 941.78 mi (1,515.65 km) |
| Ostend to Sfantu-Gheorghe | 1,104.27 mi (1,777.15 km) |
| Ostend to Sibiu | 1,037.30 mi (1,669.38 km) |
| Ostend to Sighetu Marmatiei | 963.24 mi (1,550.18 km) |
| Ostend to Sighisoara | 1,050.61 mi (1,690.79 km) |
| Ostend to Simeria | 987.35 mi (1,588.98 km) |
| Ostend to Sinaia | 1,111.31 mi (1,788.49 km) |
| Ostend to Slatina | 1,094.65 mi (1,761.67 km) |
