| Boone to Karlovo | 5,291.94 mi (8,516.55 km) |
| Boone to Karnobat | 5,379.62 mi (8,657.66 km) |
| Boone to Kavarna | 5,397.99 mi (8,687.22 km) |
| Boone to Kazanlak | 5,316.98 mi (8,556.86 km) |
| Boone to Knezha | 5,227.14 mi (8,412.27 km) |
| Boone to Kostinbrod | 5,220.16 mi (8,401.04 km) |
| Boone to Kozloduy | 5,201.42 mi (8,370.88 km) |
| Boone to Kyustendil | 5,220.08 mi (8,400.90 km) |
| Boone to Levski | 5,274.74 mi (8,488.88 km) |
| Boone to Lom | 5,179.77 mi (8,336.04 km) |
| Boone to Lovech | 5,267.78 mi (8,477.67 km) |
| Boone to Lukovit | 5,242.91 mi (8,437.65 km) |
| Boone to Lyaskovets | 5,309.26 mi (8,544.42 km) |
| Boone to Mezdra | 5,226.12 mi (8,410.63 km) |
| Boone to Momchilgrad | 5,363.49 mi (8,631.71 km) |
