| Gladbeck to Devnya | 1,117.32 mi (1,798.15 km) |
| Gladbeck to Dimitrovgrad | 1,094.22 mi (1,760.97 km) |
| Gladbeck to Dobrich | 1,113.14 mi (1,791.42 km) |
| Gladbeck to Dospat | 1,061.17 mi (1,707.80 km) |
| Gladbeck to Dupnitsa | 993.19 mi (1,598.38 km) |
| Gladbeck to Elhovo | 1,125.22 mi (1,810.86 km) |
| Gladbeck to Etropole | 997.70 mi (1,605.64 km) |
| Gladbeck to Gabrovo | 1,046.15 mi (1,683.61 km) |
| Gladbeck to Gorna Oryahovitsa | 1,048.11 mi (1,686.78 km) |
| Gladbeck to Gotse Delchev | 1,049.92 mi (1,689.68 km) |
| Gladbeck to Harmanli | 1,110.96 mi (1,787.92 km) |
| Gladbeck to Haskovo | 1,098.52 mi (1,767.90 km) |
| Gladbeck to Ihtiman | 1,009.88 mi (1,625.25 km) |
| Gladbeck to Isperih | 1,067.08 mi (1,717.30 km) |
| Gladbeck to Kardzhali | 1,104.75 mi (1,777.92 km) |
