| Illingen to Karlovo | 967.35 mi (1,556.81 km) |
| Illingen to Karnobat | 1,059.60 mi (1,705.26 km) |
| Illingen to Kavarna | 1,089.23 mi (1,752.94 km) |
| Illingen to Kazanlak | 993.22 mi (1,598.43 km) |
| Illingen to Knezha | 904.10 mi (1,455.01 km) |
| Illingen to Kostinbrod | 894.63 mi (1,439.77 km) |
| Illingen to Kozloduy | 878.85 mi (1,414.38 km) |
| Illingen to Kyustendil | 895.34 mi (1,440.92 km) |
| Illingen to Levski | 953.54 mi (1,534.57 km) |
| Illingen to Lom | 856.36 mi (1,378.17 km) |
| Illingen to Lovech | 944.57 mi (1,520.14 km) |
| Illingen to Lukovit | 918.94 mi (1,478.88 km) |
| Illingen to Lyaskovets | 988.21 mi (1,590.36 km) |
| Illingen to Mezdra | 901.36 mi (1,450.59 km) |
| Illingen to Momchilgrad | 1,037.95 mi (1,670.42 km) |
