| Hartsville to Karlovo | 5,461.32 mi (8,789.15 km) |
| Hartsville to Karnobat | 5,545.67 mi (8,924.89 km) |
| Hartsville to Kavarna | 5,559.85 mi (8,947.71 km) |
| Hartsville to Kazanlak | 5,485.54 mi (8,828.12 km) |
| Hartsville to Knezha | 5,395.39 mi (8,683.05 km) |
| Hartsville to Kostinbrod | 5,391.47 mi (8,676.74 km) |
| Hartsville to Kozloduy | 5,369.45 mi (8,641.30 km) |
| Hartsville to Kyustendil | 5,393.54 mi (8,680.07 km) |
| Hartsville to Levski | 5,441.77 mi (8,757.68 km) |
| Hartsville to Lom | 5,348.41 mi (8,607.44 km) |
| Hartsville to Lovech | 5,436.03 mi (8,748.45 km) |
| Hartsville to Lukovit | 5,411.82 mi (8,709.48 km) |
| Hartsville to Lyaskovets | 5,476.08 mi (8,812.90 km) |
| Hartsville to Mezdra | 5,395.85 mi (8,683.78 km) |
| Hartsville to Momchilgrad | 5,534.77 mi (8,907.35 km) |
