| Orpington to Karlovo | 1,302.33 mi (2,095.90 km) |
| Orpington to Karnobat | 1,392.74 mi (2,241.40 km) |
| Orpington to Kavarna | 1,418.63 mi (2,283.06 km) |
| Orpington to Kazanlak | 1,327.81 mi (2,136.90 km) |
| Orpington to Knezha | 1,238.32 mi (1,992.89 km) |
| Orpington to Kostinbrod | 1,230.28 mi (1,979.94 km) |
| Orpington to Kozloduy | 1,212.85 mi (1,951.89 km) |
| Orpington to Kyustendil | 1,231.24 mi (1,981.48 km) |
| Orpington to Levski | 1,287.02 mi (2,071.26 km) |
| Orpington to Lom | 1,190.72 mi (1,916.28 km) |
| Orpington to Lovech | 1,278.89 mi (2,058.18 km) |
| Orpington to Lukovit | 1,253.60 mi (2,017.47 km) |
| Orpington to Lyaskovets | 1,321.67 mi (2,127.02 km) |
| Orpington to Mezdra | 1,236.42 mi (1,989.82 km) |
| Orpington to Momchilgrad | 1,373.62 mi (2,210.63 km) |
