| Northbrook to Karlovo | 5,240.94 mi (8,434.48 km) |
| Northbrook to Karnobat | 5,318.70 mi (8,559.62 km) |
| Northbrook to Kavarna | 5,325.37 mi (8,570.35 km) |
| Northbrook to Kazanlak | 5,263.47 mi (8,470.74 km) |
| Northbrook to Knezha | 5,173.32 mi (8,325.65 km) |
| Northbrook to Kostinbrod | 5,175.11 mi (8,328.53 km) |
| Northbrook to Kozloduy | 5,147.12 mi (8,283.48 km) |
| Northbrook to Kyustendil | 5,181.27 mi (8,338.44 km) |
| Northbrook to Levski | 5,217.16 mi (8,396.21 km) |
| Northbrook to Lom | 5,127.34 mi (8,251.66 km) |
| Northbrook to Lovech | 5,213.71 mi (8,390.66 km) |
| Northbrook to Lukovit | 5,190.85 mi (8,353.87 km) |
| Northbrook to Lyaskovets | 5,250.91 mi (8,450.53 km) |
| Northbrook to Mezdra | 5,176.51 mi (8,330.79 km) |
| Northbrook to Momchilgrad | 5,317.48 mi (8,557.66 km) |
