| Royston to Karlovo | 1,322.08 mi (2,127.68 km) |
| Royston to Karnobat | 1,410.39 mi (2,269.80 km) |
| Royston to Kavarna | 1,433.60 mi (2,307.16 km) |
| Royston to Kazanlak | 1,347.01 mi (2,167.80 km) |
| Royston to Knezha | 1,257.18 mi (2,023.24 km) |
| Royston to Kostinbrod | 1,251.35 mi (2,013.85 km) |
| Royston to Kozloduy | 1,231.50 mi (1,981.91 km) |
| Royston to Kyustendil | 1,253.86 mi (2,017.89 km) |
| Royston to Levski | 1,305.09 mi (2,100.35 km) |
| Royston to Lom | 1,209.80 mi (1,946.98 km) |
| Royston to Lovech | 1,297.82 mi (2,088.63 km) |
| Royston to Lukovit | 1,272.95 mi (2,048.62 km) |
| Royston to Lyaskovets | 1,339.67 mi (2,155.99 km) |
| Royston to Mezdra | 1,256.35 mi (2,021.90 km) |
| Royston to Momchilgrad | 1,394.67 mi (2,244.51 km) |
