| Westerlo to Sofia | 1,040.17 mi (1,673.99 km) |
| Westerlo to Sopot | 1,098.01 mi (1,767.08 km) |
| Westerlo to Sozopol | 1,226.39 mi (1,973.69 km) |
| Westerlo to Sredets | 1,208.89 mi (1,945.53 km) |
| Westerlo to Stamboliyski | 1,112.30 mi (1,790.08 km) |
| Westerlo to Stara Zagora | 1,143.11 mi (1,839.66 km) |
| Westerlo to Svilengrad | 1,194.09 mi (1,921.70 km) |
| Westerlo to Svishtov | 1,081.64 mi (1,740.73 km) |
| Westerlo to Targovishte | 1,146.69 mi (1,845.41 km) |
| Westerlo to Teteven | 1,067.36 mi (1,717.76 km) |
| Westerlo to Troyan | 1,086.64 mi (1,748.77 km) |
| Westerlo to Tryavna | 1,118.61 mi (1,800.23 km) |
| Westerlo to Tutrakan | 1,116.69 mi (1,797.13 km) |
| Westerlo to Varna | 1,202.81 mi (1,935.73 km) |
| Westerlo to Veliki Preslav | 1,159.60 mi (1,866.20 km) |
