| Borgentreich to Smolyan | 1,003.30 mi (1,614.65 km) |
| Borgentreich to Sofia | 899.00 mi (1,446.80 km) |
| Borgentreich to Sopot | 950.95 mi (1,530.41 km) |
| Borgentreich to Sozopol | 1,070.10 mi (1,722.15 km) |
| Borgentreich to Sredets | 1,054.55 mi (1,697.13 km) |
| Borgentreich to Stamboliyski | 969.29 mi (1,559.93 km) |
| Borgentreich to Stara Zagora | 993.79 mi (1,599.36 km) |
| Borgentreich to Svilengrad | 1,046.42 mi (1,684.05 km) |
| Borgentreich to Svishtov | 926.48 mi (1,491.03 km) |
| Borgentreich to Targovishte | 989.52 mi (1,592.48 km) |
| Borgentreich to Teteven | 920.65 mi (1,481.64 km) |
| Borgentreich to Troyan | 938.29 mi (1,510.03 km) |
| Borgentreich to Tryavna | 967.35 mi (1,556.79 km) |
| Borgentreich to Tutrakan | 955.04 mi (1,536.99 km) |
| Borgentreich to Varna | 1,041.83 mi (1,676.67 km) |
