| Simmerath to Smolyan | 1,074.80 mi (1,729.73 km) |
| Simmerath to Sofia | 971.24 mi (1,563.07 km) |
| Simmerath to Sopot | 1,029.24 mi (1,656.40 km) |
| Simmerath to Sozopol | 1,158.16 mi (1,863.87 km) |
| Simmerath to Sredets | 1,140.51 mi (1,835.47 km) |
| Simmerath to Stamboliyski | 1,043.40 mi (1,679.19 km) |
| Simmerath to Stara Zagora | 1,074.43 mi (1,729.12 km) |
| Simmerath to Svilengrad | 1,125.31 mi (1,811.02 km) |
| Simmerath to Svishtov | 1,013.38 mi (1,630.88 km) |
| Simmerath to Targovishte | 1,078.57 mi (1,735.79 km) |
| Simmerath to Teteven | 998.59 mi (1,607.07 km) |
| Simmerath to Troyan | 1,017.93 mi (1,638.19 km) |
| Simmerath to Tryavna | 1,050.05 mi (1,689.89 km) |
| Simmerath to Tutrakan | 1,049.10 mi (1,688.36 km) |
| Simmerath to Varna | 1,135.08 mi (1,826.74 km) |
