| Leuven to Sofia | 1,042.55 mi (1,677.82 km) |
| Leuven to Sopot | 1,101.06 mi (1,771.98 km) |
| Leuven to Sozopol | 1,230.56 mi (1,980.39 km) |
| Leuven to Sredets | 1,212.81 mi (1,951.82 km) |
| Leuven to Stamboliyski | 1,114.82 mi (1,794.14 km) |
| Leuven to Stara Zagora | 1,146.40 mi (1,844.96 km) |
| Leuven to Svilengrad | 1,197.12 mi (1,926.58 km) |
| Leuven to Svishtov | 1,085.77 mi (1,747.38 km) |
| Leuven to Targovishte | 1,151.04 mi (1,852.42 km) |
| Leuven to Teteven | 1,070.40 mi (1,722.64 km) |
| Leuven to Troyan | 1,089.86 mi (1,753.96 km) |
| Leuven to Tryavna | 1,122.19 mi (1,805.98 km) |
| Leuven to Tutrakan | 1,121.71 mi (1,805.22 km) |
| Leuven to Varna | 1,207.67 mi (1,943.55 km) |
| Leuven to Veliki Preslav | 1,163.98 mi (1,873.25 km) |
