| Wulfrath to Popovo | 1,048.50 mi (1,687.39 km) |
| Wulfrath to Provadia | 1,103.22 mi (1,775.46 km) |
| Wulfrath to Radnevo | 1,083.30 mi (1,743.40 km) |
| Wulfrath to Radomir | 960.00 mi (1,544.98 km) |
| Wulfrath to Rakitovo | 1,028.79 mi (1,655.68 km) |
| Wulfrath to Rakovski | 1,047.07 mi (1,685.09 km) |
| Wulfrath to Razgrad | 1,051.97 mi (1,692.98 km) |
| Wulfrath to Razlog | 1,011.27 mi (1,627.48 km) |
| Wulfrath to Ruse | 1,017.46 mi (1,637.45 km) |
| Wulfrath to Samokov | 992.37 mi (1,597.06 km) |
| Wulfrath to Sandanski | 1,020.37 mi (1,642.12 km) |
| Wulfrath to Sevlievo | 1,018.99 mi (1,639.90 km) |
| Wulfrath to Shumen | 1,079.07 mi (1,736.60 km) |
| Wulfrath to Silistra | 1,058.05 mi (1,702.77 km) |
| Wulfrath to Sliven | 1,081.47 mi (1,740.46 km) |
