| Apen to Karlovo | 1,068.90 mi (1,720.23 km) |
| Apen to Karnobat | 1,143.95 mi (1,841.00 km) |
| Apen to Kavarna | 1,153.52 mi (1,856.41 km) |
| Apen to Kazanlak | 1,090.21 mi (1,754.53 km) |
| Apen to Knezha | 1,000.39 mi (1,609.97 km) |
| Apen to Kostinbrod | 1,007.75 mi (1,621.81 km) |
| Apen to Kozloduy | 974.14 mi (1,567.72 km) |
| Apen to Kyustendil | 1,019.97 mi (1,641.49 km) |
| Apen to Levski | 1,042.88 mi (1,678.35 km) |
| Apen to Lom | 955.39 mi (1,537.55 km) |
| Apen to Lovech | 1,040.48 mi (1,674.50 km) |
| Apen to Lukovit | 1,018.63 mi (1,639.33 km) |
| Apen to Lyaskovets | 1,076.42 mi (1,732.33 km) |
| Apen to Mezdra | 1,005.77 mi (1,618.64 km) |
| Apen to Momchilgrad | 1,147.69 mi (1,847.03 km) |
