| Koekelberg to Sofia | 1,056.52 mi (1,700.31 km) |
| Koekelberg to Sopot | 1,115.33 mi (1,794.95 km) |
| Koekelberg to Sozopol | 1,245.29 mi (2,004.10 km) |
| Koekelberg to Sredets | 1,227.43 mi (1,975.36 km) |
| Koekelberg to Stamboliyski | 1,128.86 mi (1,816.72 km) |
| Koekelberg to Stara Zagora | 1,160.78 mi (1,868.09 km) |
| Koekelberg to Svilengrad | 1,211.38 mi (1,949.53 km) |
| Koekelberg to Svishtov | 1,100.49 mi (1,771.07 km) |
| Koekelberg to Targovishte | 1,165.84 mi (1,876.24 km) |
| Koekelberg to Teteven | 1,084.67 mi (1,745.60 km) |
| Koekelberg to Troyan | 1,104.21 mi (1,777.06 km) |
| Koekelberg to Tryavna | 1,136.68 mi (1,829.31 km) |
| Koekelberg to Tutrakan | 1,136.75 mi (1,829.43 km) |
| Koekelberg to Varna | 1,222.65 mi (1,967.67 km) |
| Koekelberg to Veliki Preslav | 1,178.80 mi (1,897.09 km) |
