| Dorridge to Smolyan | 1,440.74 mi (2,318.65 km) |
| Dorridge to Sofia | 1,337.53 mi (2,152.55 km) |
| Dorridge to Sopot | 1,396.29 mi (2,247.11 km) |
| Dorridge to Sozopol | 1,525.36 mi (2,454.83 km) |
| Dorridge to Sredets | 1,507.81 mi (2,426.58 km) |
| Dorridge to Stamboliyski | 1,409.89 mi (2,268.99 km) |
| Dorridge to Stara Zagora | 1,441.64 mi (2,320.09 km) |
| Dorridge to Svilengrad | 1,492.36 mi (2,401.71 km) |
| Dorridge to Svishtov | 1,380.60 mi (2,221.87 km) |
| Dorridge to Targovishte | 1,445.66 mi (2,326.56 km) |
| Dorridge to Teteven | 1,365.63 mi (2,197.77 km) |
| Dorridge to Troyan | 1,385.10 mi (2,229.10 km) |
| Dorridge to Tryavna | 1,417.35 mi (2,281.01 km) |
| Dorridge to Tutrakan | 1,415.41 mi (2,277.89 km) |
| Dorridge to Varna | 1,501.63 mi (2,416.64 km) |
