| Olfen to Karlovo | 1,026.39 mi (1,651.82 km) |
| Olfen to Karnobat | 1,108.54 mi (1,784.03 km) |
| Olfen to Kavarna | 1,125.93 mi (1,812.01 km) |
| Olfen to Kazanlak | 1,049.59 mi (1,689.15 km) |
| Olfen to Knezha | 959.35 mi (1,543.93 km) |
| Olfen to Kostinbrod | 960.38 mi (1,545.59 km) |
| Olfen to Kozloduy | 933.26 mi (1,501.93 km) |
| Olfen to Kyustendil | 968.36 mi (1,558.42 km) |
| Olfen to Levski | 1,004.84 mi (1,617.13 km) |
| Olfen to Lom | 912.92 mi (1,469.20 km) |
| Olfen to Lovech | 999.91 mi (1,609.20 km) |
| Olfen to Lukovit | 976.45 mi (1,571.44 km) |
| Olfen to Lyaskovets | 1,039.06 mi (1,672.21 km) |
| Olfen to Mezdra | 961.69 mi (1,547.69 km) |
| Olfen to Momchilgrad | 1,102.58 mi (1,774.43 km) |
