| Radstock to Smolyan | 1,444.73 mi (2,325.06 km) |
| Radstock to Sofia | 1,342.57 mi (2,160.66 km) |
| Radstock to Sopot | 1,403.73 mi (2,259.08 km) |
| Radstock to Sozopol | 1,536.96 mi (2,473.50 km) |
| Radstock to Sredets | 1,518.41 mi (2,443.65 km) |
| Radstock to Stamboliyski | 1,415.28 mi (2,277.67 km) |
| Radstock to Stara Zagora | 1,449.94 mi (2,333.45 km) |
| Radstock to Svilengrad | 1,499.55 mi (2,413.29 km) |
| Radstock to Svishtov | 1,392.25 mi (2,240.60 km) |
| Radstock to Targovishte | 1,458.08 mi (2,346.55 km) |
| Radstock to Teteven | 1,373.10 mi (2,209.79 km) |
| Radstock to Troyan | 1,393.24 mi (2,242.21 km) |
| Radstock to Tryavna | 1,426.78 mi (2,296.18 km) |
| Radstock to Tutrakan | 1,430.48 mi (2,302.14 km) |
| Radstock to Varna | 1,515.99 mi (2,439.75 km) |
