| Clemson to Smolyan | 5,451.16 mi (8,772.80 km) |
| Clemson to Sofia | 5,348.86 mi (8,608.17 km) |
| Clemson to Sopot | 5,408.98 mi (8,704.92 km) |
| Clemson to Sozopol | 5,537.68 mi (8,912.04 km) |
| Clemson to Sredets | 5,520.56 mi (8,884.48 km) |
| Clemson to Stamboliyski | 5,421.51 mi (8,725.07 km) |
| Clemson to Stara Zagora | 5,454.56 mi (8,778.26 km) |
| Clemson to Svilengrad | 5,504.99 mi (8,859.43 km) |
| Clemson to Svishtov | 5,393.07 mi (8,679.30 km) |
| Clemson to Targovishte | 5,457.61 mi (8,783.18 km) |
| Clemson to Teteven | 5,378.32 mi (8,655.57 km) |
| Clemson to Troyan | 5,397.98 mi (8,687.21 km) |
| Clemson to Tryavna | 5,430.34 mi (8,739.29 km) |
| Clemson to Tutrakan | 5,425.10 mi (8,730.85 km) |
| Clemson to Varna | 5,511.78 mi (8,870.36 km) |
