| Boiling Springs to Karlovo | 5,360.22 mi (8,626.44 km) |
| Boiling Springs to Karnobat | 5,448.69 mi (8,768.81 km) |
| Boiling Springs to Kavarna | 5,468.03 mi (8,799.95 km) |
| Boiling Springs to Kazanlak | 5,385.46 mi (8,667.07 km) |
| Boiling Springs to Knezha | 5,295.73 mi (8,522.65 km) |
| Boiling Springs to Kostinbrod | 5,287.98 mi (8,510.18 km) |
| Boiling Springs to Kozloduy | 5,270.08 mi (8,481.37 km) |
| Boiling Springs to Kyustendil | 5,287.33 mi (8,509.14 km) |
| Boiling Springs to Levski | 5,343.62 mi (8,599.72 km) |
| Boiling Springs to Lom | 5,248.28 mi (8,446.29 km) |
| Boiling Springs to Lovech | 5,336.35 mi (8,588.03 km) |
| Boiling Springs to Lukovit | 5,311.33 mi (8,547.75 km) |
| Boiling Springs to Lyaskovets | 5,378.17 mi (8,655.32 km) |
| Boiling Springs to Mezdra | 5,294.34 mi (8,520.41 km) |
| Boiling Springs to Momchilgrad | 5,431.27 mi (8,740.78 km) |
