| Pen-y-Bont ar Ogwr to Karlovo | 1,457.23 mi (2,345.19 km) |
| Pen-y-Bont ar Ogwr to Karnobat | 1,549.02 mi (2,492.91 km) |
| Pen-y-Bont ar Ogwr to Kavarna | 1,576.21 mi (2,536.67 km) |
| Pen-y-Bont ar Ogwr to Kazanlak | 1,483.10 mi (2,386.81 km) |
| Pen-y-Bont ar Ogwr to Knezha | 1,393.91 mi (2,243.28 km) |
| Pen-y-Bont ar Ogwr to Kostinbrod | 1,384.15 mi (2,227.57 km) |
| Pen-y-Bont ar Ogwr to Kozloduy | 1,368.59 mi (2,202.54 km) |
| Pen-y-Bont ar Ogwr to Kyustendil | 1,383.63 mi (2,226.74 km) |
| Pen-y-Bont ar Ogwr to Levski | 1,443.10 mi (2,322.44 km) |
| Pen-y-Bont ar Ogwr to Lom | 1,346.19 mi (2,166.49 km) |
| Pen-y-Bont ar Ogwr to Lovech | 1,434.41 mi (2,308.45 km) |
| Pen-y-Bont ar Ogwr to Lukovit | 1,408.82 mi (2,267.28 km) |
| Pen-y-Bont ar Ogwr to Lyaskovets | 1,477.76 mi (2,378.22 km) |
| Pen-y-Bont ar Ogwr to Mezdra | 1,391.22 mi (2,238.96 km) |
| Pen-y-Bont ar Ogwr to Momchilgrad | 1,527.38 mi (2,458.09 km) |
