| Herzogenrath to Popovo | 1,074.90 mi (1,729.89 km) |
| Herzogenrath to Provadia | 1,130.67 mi (1,819.64 km) |
| Herzogenrath to Radnevo | 1,107.04 mi (1,781.60 km) |
| Herzogenrath to Radomir | 979.88 mi (1,576.97 km) |
| Herzogenrath to Rakitovo | 1,049.18 mi (1,688.49 km) |
| Herzogenrath to Rakovski | 1,069.44 mi (1,721.10 km) |
| Herzogenrath to Razgrad | 1,079.11 mi (1,736.67 km) |
| Herzogenrath to Razlog | 1,030.45 mi (1,658.35 km) |
| Herzogenrath to Ruse | 1,044.59 mi (1,681.11 km) |
| Herzogenrath to Samokov | 1,012.73 mi (1,629.83 km) |
| Herzogenrath to Sandanski | 1,038.54 mi (1,671.37 km) |
| Herzogenrath to Sevlievo | 1,043.22 mi (1,678.90 km) |
| Herzogenrath to Shumen | 1,106.16 mi (1,780.20 km) |
| Herzogenrath to Silistra | 1,087.30 mi (1,749.84 km) |
| Herzogenrath to Sliven | 1,106.55 mi (1,780.82 km) |
