| Altena to Popovo | 1,024.09 mi (1,648.11 km) |
| Altena to Provadia | 1,078.49 mi (1,735.66 km) |
| Altena to Radnevo | 1,059.71 mi (1,705.45 km) |
| Altena to Radomir | 937.80 mi (1,509.25 km) |
| Altena to Rakitovo | 1,006.38 mi (1,619.60 km) |
| Altena to Rakovski | 1,023.95 mi (1,647.89 km) |
| Altena to Razgrad | 1,027.34 mi (1,653.34 km) |
| Altena to Razlog | 989.29 mi (1,592.11 km) |
| Altena to Ruse | 992.85 mi (1,597.83 km) |
| Altena to Samokov | 969.98 mi (1,561.03 km) |
| Altena to Sandanski | 998.76 mi (1,607.34 km) |
| Altena to Sevlievo | 995.27 mi (1,601.73 km) |
| Altena to Shumen | 1,054.45 mi (1,696.98 km) |
| Altena to Silistra | 1,032.82 mi (1,662.16 km) |
| Altena to Sliven | 1,057.46 mi (1,701.82 km) |
