| Bonn to Popovo | 1,030.91 mi (1,659.09 km) |
| Bonn to Provadia | 1,086.51 mi (1,748.57 km) |
| Bonn to Radnevo | 1,063.61 mi (1,711.71 km) |
| Bonn to Radomir | 937.49 mi (1,508.75 km) |
| Bonn to Rakitovo | 1,006.65 mi (1,620.04 km) |
| Bonn to Rakovski | 1,026.35 mi (1,651.75 km) |
| Bonn to Razgrad | 1,035.00 mi (1,665.67 km) |
| Bonn to Razlog | 988.29 mi (1,590.50 km) |
| Bonn to Ruse | 1,000.47 mi (1,610.11 km) |
| Bonn to Samokov | 970.20 mi (1,561.38 km) |
| Bonn to Sandanski | 996.72 mi (1,604.06 km) |
| Bonn to Sevlievo | 999.67 mi (1,608.81 km) |
| Bonn to Shumen | 1,062.06 mi (1,709.22 km) |
| Bonn to Silistra | 1,042.89 mi (1,678.38 km) |
| Bonn to Sliven | 1,062.82 mi (1,710.44 km) |
