| Risca to Karlovo | 1,438.62 mi (2,315.23 km) |
| Risca to Karnobat | 1,529.92 mi (2,462.16 km) |
| Risca to Kavarna | 1,556.52 mi (2,504.98 km) |
| Risca to Kazanlak | 1,464.35 mi (2,356.64 km) |
| Risca to Knezha | 1,375.05 mi (2,212.93 km) |
| Risca to Kostinbrod | 1,365.85 mi (2,198.12 km) |
| Risca to Kozloduy | 1,349.68 mi (2,172.09 km) |
| Risca to Kyustendil | 1,365.76 mi (2,197.99 km) |
| Risca to Levski | 1,424.06 mi (2,291.81 km) |
| Risca to Lom | 1,327.37 mi (2,136.20 km) |
| Risca to Lovech | 1,415.57 mi (2,278.15 km) |
| Risca to Lukovit | 1,390.09 mi (2,237.13 km) |
| Risca to Lyaskovets | 1,458.72 mi (2,347.58 km) |
| Risca to Mezdra | 1,372.63 mi (2,209.04 km) |
| Risca to Momchilgrad | 1,509.13 mi (2,428.71 km) |
