| Hartsville to Smolyan | 5,504.29 mi (8,858.30 km) |
| Hartsville to Sofia | 5,401.02 mi (8,692.10 km) |
| Hartsville to Sopot | 5,458.81 mi (8,785.11 km) |
| Hartsville to Sozopol | 5,582.91 mi (8,984.82 km) |
| Hartsville to Sredets | 5,566.90 mi (8,959.06 km) |
| Hartsville to Stamboliyski | 5,473.28 mi (8,808.39 km) |
| Hartsville to Stara Zagora | 5,503.45 mi (8,856.94 km) |
| Hartsville to Svilengrad | 5,554.88 mi (8,939.71 km) |
| Hartsville to Svishtov | 5,438.93 mi (8,753.10 km) |
| Hartsville to Targovishte | 5,502.39 mi (8,855.25 km) |
| Hartsville to Teteven | 5,428.19 mi (8,735.83 km) |
| Hartsville to Troyan | 5,447.16 mi (8,766.36 km) |
| Hartsville to Tryavna | 5,478.20 mi (8,816.31 km) |
| Hartsville to Tutrakan | 5,467.43 mi (8,798.97 km) |
| Hartsville to Varna | 5,554.26 mi (8,938.72 km) |
