| Altena to Devnya | 1,082.35 mi (1,741.88 km) |
| Altena to Dimitrovgrad | 1,058.89 mi (1,704.13 km) |
| Altena to Dobrich | 1,078.31 mi (1,735.38 km) |
| Altena to Dospat | 1,025.87 mi (1,650.97 km) |
| Altena to Dupnitsa | 957.90 mi (1,541.58 km) |
| Altena to Elhovo | 1,089.95 mi (1,754.11 km) |
| Altena to Etropole | 962.36 mi (1,548.78 km) |
| Altena to Gabrovo | 1,010.87 mi (1,626.84 km) |
| Altena to Gorna Oryahovitsa | 1,012.90 mi (1,630.11 km) |
| Altena to Gotse Delchev | 1,014.64 mi (1,632.91 km) |
| Altena to Harmanli | 1,075.64 mi (1,731.08 km) |
| Altena to Haskovo | 1,063.19 mi (1,711.05 km) |
| Altena to Ihtiman | 974.55 mi (1,568.39 km) |
| Altena to Isperih | 1,032.14 mi (1,661.06 km) |
| Altena to Kardzhali | 1,069.41 mi (1,721.05 km) |
