| Unna to Devnya | 1,087.98 mi (1,750.94 km) |
| Unna to Dimitrovgrad | 1,066.30 mi (1,716.04 km) |
| Unna to Dobrich | 1,083.55 mi (1,743.81 km) |
| Unna to Dospat | 1,034.26 mi (1,664.48 km) |
| Unna to Dupnitsa | 966.42 mi (1,555.31 km) |
| Unna to Elhovo | 1,096.82 mi (1,765.15 km) |
| Unna to Etropole | 970.01 mi (1,561.09 km) |
| Unna to Gabrovo | 1,017.82 mi (1,638.02 km) |
| Unna to Gorna Oryahovitsa | 1,019.47 mi (1,640.67 km) |
| Unna to Gotse Delchev | 1,023.31 mi (1,646.86 km) |
| Unna to Harmanli | 1,082.98 mi (1,742.89 km) |
| Unna to Haskovo | 1,070.70 mi (1,723.12 km) |
| Unna to Ihtiman | 982.59 mi (1,581.32 km) |
| Unna to Isperih | 1,037.70 mi (1,670.02 km) |
| Unna to Kardzhali | 1,077.20 mi (1,733.59 km) |
