| Cologne to Popovo | 1,042.21 mi (1,677.27 km) |
| Cologne to Provadia | 1,097.54 mi (1,766.32 km) |
| Cologne to Radnevo | 1,075.55 mi (1,730.93 km) |
| Cologne to Radomir | 950.25 mi (1,529.28 km) |
| Cologne to Rakitovo | 1,019.31 mi (1,640.41 km) |
| Cologne to Rakovski | 1,038.60 mi (1,671.46 km) |
| Cologne to Razgrad | 1,046.10 mi (1,683.54 km) |
| Cologne to Razlog | 1,001.19 mi (1,611.25 km) |
| Cologne to Ruse | 1,011.58 mi (1,627.98 km) |
| Cologne to Samokov | 982.86 mi (1,581.76 km) |
| Cologne to Sandanski | 1,009.80 mi (1,625.12 km) |
| Cologne to Sevlievo | 1,011.49 mi (1,627.84 km) |
| Cologne to Shumen | 1,073.18 mi (1,727.11 km) |
| Cologne to Silistra | 1,053.42 mi (1,695.31 km) |
| Cologne to Sliven | 1,074.45 mi (1,729.16 km) |
