| Black Forest to Popovo | 5,969.57 mi (9,607.10 km) |
| Black Forest to Provadia | 6,014.10 mi (9,678.76 km) |
| Black Forest to Radnevo | 6,019.24 mi (9,687.03 km) |
| Black Forest to Radomir | 5,913.63 mi (9,517.07 km) |
| Black Forest to Rakitovo | 5,980.05 mi (9,623.96 km) |
| Black Forest to Rakovski | 5,990.48 mi (9,640.74 km) |
| Black Forest to Razgrad | 5,967.66 mi (9,604.02 km) |
| Black Forest to Razlog | 5,966.22 mi (9,601.70 km) |
| Black Forest to Ruse | 5,934.93 mi (9,551.34 km) |
| Black Forest to Samokov | 5,944.20 mi (9,566.26 km) |
| Black Forest to Sandanski | 5,977.61 mi (9,620.03 km) |
| Black Forest to Sevlievo | 5,954.16 mi (9,582.30 km) |
| Black Forest to Shumen | 5,993.89 mi (9,646.23 km) |
| Black Forest to Silistra | 5,956.45 mi (9,585.98 km) |
| Black Forest to Sliven | 6,009.82 mi (9,671.88 km) |
