| Etterbeek to Sofia | 1,053.57 mi (1,695.56 km) |
| Etterbeek to Sopot | 1,112.43 mi (1,790.28 km) |
| Etterbeek to Sozopol | 1,242.48 mi (1,999.57 km) |
| Etterbeek to Sredets | 1,224.60 mi (1,970.81 km) |
| Etterbeek to Stamboliyski | 1,125.92 mi (1,811.99 km) |
| Etterbeek to Stara Zagora | 1,157.90 mi (1,863.45 km) |
| Etterbeek to Svilengrad | 1,208.48 mi (1,944.86 km) |
| Etterbeek to Svishtov | 1,097.68 mi (1,766.55 km) |
| Etterbeek to Targovishte | 1,163.05 mi (1,871.75 km) |
| Etterbeek to Teteven | 1,081.77 mi (1,740.93 km) |
| Etterbeek to Troyan | 1,101.32 mi (1,772.41 km) |
| Etterbeek to Tryavna | 1,133.82 mi (1,824.71 km) |
| Etterbeek to Tutrakan | 1,134.03 mi (1,825.04 km) |
| Etterbeek to Varna | 1,219.91 mi (1,963.25 km) |
| Etterbeek to Veliki Preslav | 1,176.01 mi (1,892.60 km) |
