| Irun to Karlovo | 1,339.30 mi (2,155.40 km) |
| Irun to Karnobat | 1,447.84 mi (2,330.07 km) |
| Irun to Kavarna | 1,504.22 mi (2,420.81 km) |
| Irun to Kazanlak | 1,369.22 mi (2,203.55 km) |
| Irun to Knezha | 1,293.20 mi (2,081.20 km) |
| Irun to Kostinbrod | 1,257.76 mi (2,024.18 km) |
| Irun to Kozloduy | 1,273.14 mi (2,048.93 km) |
| Irun to Kyustendil | 1,238.11 mi (1,992.55 km) |
| Irun to Levski | 1,346.67 mi (2,167.25 km) |
| Irun to Lom | 1,248.25 mi (2,008.86 km) |
| Irun to Lovech | 1,328.66 mi (2,138.28 km) |
| Irun to Lukovit | 1,300.56 mi (2,093.04 km) |
| Irun to Lyaskovets | 1,378.73 mi (2,218.84 km) |
| Irun to Mezdra | 1,277.92 mi (2,056.61 km) |
| Irun to Momchilgrad | 1,386.72 mi (2,231.70 km) |
