| Gladbeck to Karlovo | 1,036.64 mi (1,668.31 km) |
| Gladbeck to Karnobat | 1,120.01 mi (1,802.48 km) |
| Gladbeck to Kavarna | 1,138.69 mi (1,832.55 km) |
| Gladbeck to Kazanlak | 1,060.17 mi (1,706.18 km) |
| Gladbeck to Knezha | 969.95 mi (1,560.98 km) |
| Gladbeck to Kostinbrod | 969.76 mi (1,560.68 km) |
| Gladbeck to Kozloduy | 943.91 mi (1,519.07 km) |
| Gladbeck to Kyustendil | 976.86 mi (1,572.10 km) |
| Gladbeck to Levski | 1,015.93 mi (1,634.98 km) |
| Gladbeck to Lom | 923.29 mi (1,485.90 km) |
| Gladbeck to Lovech | 1,010.55 mi (1,626.32 km) |
| Gladbeck to Lukovit | 986.80 mi (1,588.11 km) |
| Gladbeck to Lyaskovets | 1,050.25 mi (1,690.21 km) |
| Gladbeck to Mezdra | 971.70 mi (1,563.81 km) |
| Gladbeck to Momchilgrad | 1,112.26 mi (1,790.00 km) |
