| Kelsterbach to Smolyan | 970.86 mi (1,562.46 km) |
| Kelsterbach to Sofia | 867.12 mi (1,395.49 km) |
| Kelsterbach to Sopot | 924.53 mi (1,487.88 km) |
| Kelsterbach to Sozopol | 1,052.97 mi (1,694.59 km) |
| Kelsterbach to Sredets | 1,035.37 mi (1,666.27 km) |
| Kelsterbach to Stamboliyski | 939.11 mi (1,511.36 km) |
| Kelsterbach to Stara Zagora | 969.55 mi (1,560.35 km) |
| Kelsterbach to Svilengrad | 1,020.60 mi (1,642.50 km) |
| Kelsterbach to Svishtov | 908.20 mi (1,461.61 km) |
| Kelsterbach to Targovishte | 973.37 mi (1,566.48 km) |
| Kelsterbach to Teteven | 893.89 mi (1,438.57 km) |
| Kelsterbach to Troyan | 913.10 mi (1,469.49 km) |
| Kelsterbach to Tryavna | 945.04 mi (1,520.89 km) |
| Kelsterbach to Tutrakan | 943.98 mi (1,519.18 km) |
| Kelsterbach to Varna | 1,029.92 mi (1,657.49 km) |
