| Kirchberg to Smolyan | 868.31 mi (1,397.40 km) |
| Kirchberg to Sofia | 768.19 mi (1,236.29 km) |
| Kirchberg to Sopot | 832.83 mi (1,340.31 km) |
| Kirchberg to Sozopol | 973.21 mi (1,566.24 km) |
| Kirchberg to Sredets | 952.68 mi (1,533.19 km) |
| Kirchberg to Stamboliyski | 840.95 mi (1,353.37 km) |
| Kirchberg to Stara Zagora | 880.22 mi (1,416.58 km) |
| Kirchberg to Svilengrad | 927.50 mi (1,492.67 km) |
| Kirchberg to Svishtov | 830.34 mi (1,336.30 km) |
| Kirchberg to Targovishte | 897.16 mi (1,443.83 km) |
| Kirchberg to Teteven | 802.51 mi (1,291.52 km) |
| Kirchberg to Troyan | 823.74 mi (1,325.68 km) |
| Kirchberg to Tryavna | 859.49 mi (1,383.21 km) |
| Kirchberg to Tutrakan | 877.00 mi (1,411.40 km) |
| Kirchberg to Varna | 959.24 mi (1,543.75 km) |
