| Runkel to Smolyan | 997.36 mi (1,605.10 km) |
| Runkel to Sofia | 893.48 mi (1,437.92 km) |
| Runkel to Sopot | 950.27 mi (1,529.32 km) |
| Runkel to Sozopol | 1,077.55 mi (1,734.15 km) |
| Runkel to Sredets | 1,060.23 mi (1,706.28 km) |
| Runkel to Stamboliyski | 965.33 mi (1,553.55 km) |
| Runkel to Stara Zagora | 995.05 mi (1,601.38 km) |
| Runkel to Svilengrad | 1,046.33 mi (1,683.91 km) |
| Runkel to Svishtov | 932.84 mi (1,501.26 km) |
| Runkel to Targovishte | 997.75 mi (1,605.73 km) |
| Runkel to Teteven | 919.65 mi (1,480.04 km) |
| Runkel to Troyan | 938.68 mi (1,510.66 km) |
| Runkel to Tryavna | 970.26 mi (1,561.48 km) |
| Runkel to Tutrakan | 967.57 mi (1,557.16 km) |
| Runkel to Varna | 1,053.71 mi (1,695.78 km) |
