| Bolbec to Smolyan | 1,287.57 mi (2,072.14 km) |
| Bolbec to Sofia | 1,186.89 mi (1,910.12 km) |
| Bolbec to Sopot | 1,250.41 mi (2,012.34 km) |
| Bolbec to Sozopol | 1,387.97 mi (2,233.72 km) |
| Bolbec to Sredets | 1,368.29 mi (2,202.06 km) |
| Bolbec to Stamboliyski | 1,259.69 mi (2,027.28 km) |
| Bolbec to Stara Zagora | 1,297.40 mi (2,087.97 km) |
| Bolbec to Svilengrad | 1,345.60 mi (2,165.53 km) |
| Bolbec to Svishtov | 1,243.91 mi (2,001.88 km) |
| Bolbec to Targovishte | 1,310.40 mi (2,108.89 km) |
| Bolbec to Teteven | 1,219.93 mi (1,963.29 km) |
| Bolbec to Troyan | 1,240.76 mi (1,996.80 km) |
| Bolbec to Tryavna | 1,275.63 mi (2,052.93 km) |
| Bolbec to Tutrakan | 1,286.33 mi (2,070.15 km) |
| Bolbec to Varna | 1,370.53 mi (2,205.66 km) |
