| Isabela to Karlovo | 5,450.84 mi (8,772.27 km) |
| Isabela to Karnobat | 5,557.51 mi (8,943.95 km) |
| Isabela to Kavarna | 5,606.85 mi (9,023.35 km) |
| Isabela to Kazanlak | 5,480.41 mi (8,819.86 km) |
| Isabela to Knezha | 5,400.50 mi (8,691.26 km) |
| Isabela to Kostinbrod | 5,369.69 mi (8,641.68 km) |
| Isabela to Kozloduy | 5,378.73 mi (8,656.22 km) |
| Isabela to Kyustendil | 5,352.13 mi (8,613.43 km) |
| Isabela to Levski | 5,453.79 mi (8,777.03 km) |
| Isabela to Lom | 5,354.03 mi (8,616.47 km) |
| Isabela to Lovech | 5,437.70 mi (8,751.13 km) |
| Isabela to Lukovit | 5,409.72 mi (8,706.10 km) |
| Isabela to Lyaskovets | 5,486.98 mi (8,830.44 km) |
| Isabela to Mezdra | 5,387.79 mi (8,670.81 km) |
| Isabela to Momchilgrad | 5,501.21 mi (8,853.35 km) |
