| Erkelenz to Popovo | 1,071.64 mi (1,724.64 km) |
| Erkelenz to Provadia | 1,126.99 mi (1,813.72 km) |
| Erkelenz to Radnevo | 1,104.86 mi (1,778.09 km) |
| Erkelenz to Radomir | 979.19 mi (1,575.85 km) |
| Erkelenz to Rakitovo | 1,048.30 mi (1,687.08 km) |
| Erkelenz to Rakovski | 1,067.80 mi (1,718.45 km) |
| Erkelenz to Razgrad | 1,075.55 mi (1,730.93 km) |
| Erkelenz to Razlog | 1,030.03 mi (1,657.68 km) |
| Erkelenz to Ruse | 1,041.03 mi (1,675.37 km) |
| Erkelenz to Samokov | 1,011.85 mi (1,628.42 km) |
| Erkelenz to Sandanski | 1,038.51 mi (1,671.32 km) |
| Erkelenz to Sevlievo | 1,040.83 mi (1,675.05 km) |
| Erkelenz to Shumen | 1,102.63 mi (1,774.51 km) |
| Erkelenz to Silistra | 1,082.86 mi (1,742.70 km) |
| Erkelenz to Sliven | 1,103.83 mi (1,776.45 km) |
