| Llantrisant to Karlovo | 1,449.32 mi (2,332.45 km) |
| Llantrisant to Karnobat | 1,540.92 mi (2,479.88 km) |
| Llantrisant to Kavarna | 1,567.90 mi (2,523.29 km) |
| Llantrisant to Kazanlak | 1,475.13 mi (2,373.99 km) |
| Llantrisant to Knezha | 1,385.90 mi (2,230.40 km) |
| Llantrisant to Kostinbrod | 1,376.35 mi (2,215.02 km) |
| Llantrisant to Kozloduy | 1,360.56 mi (2,189.62 km) |
| Llantrisant to Kyustendil | 1,376.00 mi (2,214.45 km) |
| Llantrisant to Levski | 1,435.02 mi (2,309.45 km) |
| Llantrisant to Lom | 1,338.20 mi (2,153.62 km) |
| Llantrisant to Lovech | 1,426.41 mi (2,295.58 km) |
| Llantrisant to Lukovit | 1,400.86 mi (2,254.47 km) |
| Llantrisant to Lyaskovets | 1,469.69 mi (2,365.23 km) |
| Llantrisant to Mezdra | 1,383.32 mi (2,226.23 km) |
| Llantrisant to Momchilgrad | 1,519.60 mi (2,445.56 km) |
