| Rockville to Karlovo | 4,975.86 mi (8,007.88 km) |
| Rockville to Karnobat | 5,063.92 mi (8,149.59 km) |
| Rockville to Kavarna | 5,082.91 mi (8,180.15 km) |
| Rockville to Kazanlak | 5,000.99 mi (8,048.32 km) |
| Rockville to Knezha | 4,911.20 mi (7,903.81 km) |
| Rockville to Kostinbrod | 4,903.91 mi (7,892.08 km) |
| Rockville to Kozloduy | 4,885.51 mi (7,862.47 km) |
| Rockville to Kyustendil | 4,903.66 mi (7,891.68 km) |
| Rockville to Levski | 4,958.94 mi (7,980.64 km) |
| Rockville to Lom | 4,863.79 mi (7,827.51 km) |
| Rockville to Lovech | 4,951.83 mi (7,969.20 km) |
| Rockville to Lukovit | 4,926.89 mi (7,929.06 km) |
| Rockville to Lyaskovets | 4,993.47 mi (8,036.21 km) |
| Rockville to Mezdra | 4,910.01 mi (7,901.91 km) |
| Rockville to Momchilgrad | 5,047.23 mi (8,122.73 km) |
