| Cwmbran to Karlovo | 1,436.49 mi (2,311.81 km) |
| Cwmbran to Karnobat | 1,527.63 mi (2,458.48 km) |
| Cwmbran to Kavarna | 1,554.04 mi (2,500.98 km) |
| Cwmbran to Kazanlak | 1,462.18 mi (2,353.16 km) |
| Cwmbran to Knezha | 1,372.85 mi (2,209.39 km) |
| Cwmbran to Kostinbrod | 1,363.83 mi (2,194.87 km) |
| Cwmbran to Kozloduy | 1,347.46 mi (2,168.52 km) |
| Cwmbran to Kyustendil | 1,363.88 mi (2,194.94 km) |
| Cwmbran to Levski | 1,421.80 mi (2,288.17 km) |
| Cwmbran to Lom | 1,325.18 mi (2,132.68 km) |
| Cwmbran to Lovech | 1,413.38 mi (2,274.62 km) |
| Cwmbran to Lukovit | 1,387.93 mi (2,233.66 km) |
| Cwmbran to Lyaskovets | 1,456.46 mi (2,343.95 km) |
| Cwmbran to Mezdra | 1,370.52 mi (2,205.63 km) |
| Cwmbran to Momchilgrad | 1,507.12 mi (2,425.48 km) |
