| Saint-Ghislain to Sofia | 1,065.63 mi (1,714.97 km) |
| Saint-Ghislain to Sopot | 1,125.78 mi (1,811.77 km) |
| Saint-Ghislain to Sozopol | 1,257.98 mi (2,024.52 km) |
| Saint-Ghislain to Sredets | 1,239.60 mi (1,994.94 km) |
| Saint-Ghislain to Stamboliyski | 1,138.20 mi (1,831.76 km) |
| Saint-Ghislain to Stara Zagora | 1,171.71 mi (1,885.68 km) |
| Saint-Ghislain to Svilengrad | 1,221.73 mi (1,966.18 km) |
| Saint-Ghislain to Svishtov | 1,113.22 mi (1,791.56 km) |
| Saint-Ghislain to Targovishte | 1,178.97 mi (1,897.37 km) |
| Saint-Ghislain to Teteven | 1,095.13 mi (1,762.44 km) |
| Saint-Ghislain to Troyan | 1,115.05 mi (1,794.49 km) |
| Saint-Ghislain to Tryavna | 1,148.22 mi (1,847.87 km) |
| Saint-Ghislain to Tutrakan | 1,151.30 mi (1,852.83 km) |
| Saint-Ghislain to Varna | 1,236.79 mi (1,990.42 km) |
| Saint-Ghislain to Veliki Preslav | 1,191.98 mi (1,918.31 km) |
