| Boechout to Sofia | 1,059.06 mi (1,704.39 km) |
| Boechout to Sopot | 1,117.05 mi (1,797.73 km) |
| Boechout to Sozopol | 1,245.63 mi (2,004.64 km) |
| Boechout to Sredets | 1,228.09 mi (1,976.43 km) |
| Boechout to Stamboliyski | 1,131.23 mi (1,820.53 km) |
| Boechout to Stara Zagora | 1,162.20 mi (1,870.39 km) |
| Boechout to Svilengrad | 1,213.13 mi (1,952.35 km) |
| Boechout to Svishtov | 1,100.87 mi (1,771.68 km) |
| Boechout to Targovishte | 1,165.94 mi (1,876.41 km) |
| Boechout to Teteven | 1,086.40 mi (1,748.40 km) |
| Boechout to Troyan | 1,105.72 mi (1,779.48 km) |
| Boechout to Tryavna | 1,137.76 mi (1,831.04 km) |
| Boechout to Tutrakan | 1,136.01 mi (1,828.23 km) |
| Boechout to Varna | 1,222.12 mi (1,966.81 km) |
| Boechout to Veliki Preslav | 1,178.86 mi (1,897.20 km) |
