| Clydebank to Smolyan | 1,634.10 mi (2,629.83 km) |
| Clydebank to Sofia | 1,529.82 mi (2,462.00 km) |
| Clydebank to Sopot | 1,582.57 mi (2,546.90 km) |
| Clydebank to Sozopol | 1,700.41 mi (2,736.55 km) |
| Clydebank to Sredets | 1,685.44 mi (2,712.45 km) |
| Clydebank to Stamboliyski | 1,600.53 mi (2,575.80 km) |
| Clydebank to Stara Zagora | 1,625.42 mi (2,615.85 km) |
| Clydebank to Svilengrad | 1,678.07 mi (2,700.59 km) |
| Clydebank to Svishtov | 1,557.39 mi (2,506.37 km) |
| Clydebank to Targovishte | 1,619.72 mi (2,606.69 km) |
| Clydebank to Teteven | 1,552.24 mi (2,498.09 km) |
| Clydebank to Troyan | 1,569.94 mi (2,526.57 km) |
| Clydebank to Tryavna | 1,598.85 mi (2,573.09 km) |
| Clydebank to Tutrakan | 1,583.39 mi (2,548.22 km) |
| Clydebank to Varna | 1,670.21 mi (2,687.95 km) |
