| Friedrichsdorf to Popovo | 955.74 mi (1,538.12 km) |
| Friedrichsdorf to Provadia | 1,011.48 mi (1,627.82 km) |
| Friedrichsdorf to Radnevo | 988.32 mi (1,590.54 km) |
| Friedrichsdorf to Radomir | 862.58 mi (1,388.19 km) |
| Friedrichsdorf to Rakitovo | 931.65 mi (1,499.35 km) |
| Friedrichsdorf to Rakovski | 951.13 mi (1,530.69 km) |
| Friedrichsdorf to Razgrad | 959.92 mi (1,544.85 km) |
| Friedrichsdorf to Razlog | 913.52 mi (1,470.17 km) |
| Friedrichsdorf to Ruse | 925.40 mi (1,489.29 km) |
| Friedrichsdorf to Samokov | 895.21 mi (1,440.70 km) |
| Friedrichsdorf to Sandanski | 922.17 mi (1,484.09 km) |
| Friedrichsdorf to Sevlievo | 924.38 mi (1,487.64 km) |
| Friedrichsdorf to Shumen | 986.97 mi (1,588.38 km) |
| Friedrichsdorf to Silistra | 968.25 mi (1,558.24 km) |
| Friedrichsdorf to Sliven | 987.55 mi (1,589.31 km) |
