| Caerfyrddin to Karlovo | 1,493.63 mi (2,403.76 km) |
| Caerfyrddin to Karnobat | 1,584.71 mi (2,550.35 km) |
| Caerfyrddin to Kavarna | 1,610.90 mi (2,592.49 km) |
| Caerfyrddin to Kazanlak | 1,519.31 mi (2,445.10 km) |
| Caerfyrddin to Knezha | 1,429.97 mi (2,301.32 km) |
| Caerfyrddin to Kostinbrod | 1,420.94 mi (2,286.79 km) |
| Caerfyrddin to Kozloduy | 1,404.57 mi (2,260.44 km) |
| Caerfyrddin to Kyustendil | 1,420.91 mi (2,286.73 km) |
| Caerfyrddin to Levski | 1,478.90 mi (2,380.06 km) |
| Caerfyrddin to Lom | 1,382.31 mi (2,224.61 km) |
| Caerfyrddin to Lovech | 1,470.51 mi (2,366.56 km) |
| Caerfyrddin to Lukovit | 1,445.06 mi (2,325.60 km) |
| Caerfyrddin to Lyaskovets | 1,513.56 mi (2,435.83 km) |
| Caerfyrddin to Mezdra | 1,427.65 mi (2,297.58 km) |
| Caerfyrddin to Momchilgrad | 1,564.23 mi (2,517.39 km) |
