| Radviliskis to Karlovo | 910.75 mi (1,465.71 km) |
| Radviliskis to Karnobat | 922.54 mi (1,484.69 km) |
| Radviliskis to Kavarna | 880.35 mi (1,416.78 km) |
| Radviliskis to Kazanlak | 914.61 mi (1,471.93 km) |
| Radviliskis to Knezha | 850.18 mi (1,368.23 km) |
| Radviliskis to Kostinbrod | 897.18 mi (1,443.87 km) |
| Radviliskis to Kozloduy | 830.31 mi (1,336.26 km) |
| Radviliskis to Kyustendil | 934.72 mi (1,504.28 km) |
| Radviliskis to Levski | 861.92 mi (1,387.13 km) |
| Radviliskis to Lom | 827.47 mi (1,331.68 km) |
| Radviliskis to Lovech | 876.62 mi (1,410.79 km) |
| Radviliskis to Lukovit | 871.01 mi (1,401.75 km) |
| Radviliskis to Lyaskovets | 882.75 mi (1,420.65 km) |
| Radviliskis to Mezdra | 874.06 mi (1,406.66 km) |
| Radviliskis to Momchilgrad | 989.31 mi (1,592.15 km) |
