| Clarksburg to Karlovo | 4,973.96 mi (8,004.82 km) |
| Clarksburg to Karnobat | 5,061.82 mi (8,146.21 km) |
| Clarksburg to Kavarna | 5,080.56 mi (8,176.37 km) |
| Clarksburg to Kazanlak | 4,999.04 mi (8,045.18 km) |
| Clarksburg to Knezha | 4,909.22 mi (7,900.63 km) |
| Clarksburg to Kostinbrod | 4,902.13 mi (7,889.21 km) |
| Clarksburg to Kozloduy | 4,883.52 mi (7,859.26 km) |
| Clarksburg to Kyustendil | 4,902.02 mi (7,889.03 km) |
| Clarksburg to Levski | 4,956.89 mi (7,977.34 km) |
| Clarksburg to Lom | 4,861.83 mi (7,824.37 km) |
| Clarksburg to Lovech | 4,949.86 mi (7,966.03 km) |
| Clarksburg to Lukovit | 4,924.96 mi (7,925.95 km) |
| Clarksburg to Lyaskovets | 4,991.41 mi (8,032.91 km) |
| Clarksburg to Mezdra | 4,908.13 mi (7,898.88 km) |
| Clarksburg to Momchilgrad | 5,045.46 mi (8,119.88 km) |
