| Hennef to Devnya | 1,084.35 mi (1,745.10 km) |
| Hennef to Dimitrovgrad | 1,056.21 mi (1,699.80 km) |
| Hennef to Dobrich | 1,081.32 mi (1,740.22 km) |
| Hennef to Dospat | 1,020.48 mi (1,642.30 km) |
| Hennef to Dupnitsa | 952.19 mi (1,532.41 km) |
| Hennef to Elhovo | 1,088.71 mi (1,752.11 km) |
| Hennef to Etropole | 959.11 mi (1,543.54 km) |
| Hennef to Gabrovo | 1,009.47 mi (1,624.59 km) |
| Hennef to Gorna Oryahovitsa | 1,012.53 mi (1,629.51 km) |
| Hennef to Gotse Delchev | 1,008.48 mi (1,623.00 km) |
| Hennef to Harmanli | 1,073.12 mi (1,727.02 km) |
| Hennef to Haskovo | 1,060.24 mi (1,706.29 km) |
| Hennef to Ihtiman | 970.21 mi (1,561.40 km) |
| Hennef to Isperih | 1,034.36 mi (1,664.64 km) |
| Hennef to Kardzhali | 1,065.66 mi (1,715.02 km) |
