| Herstal to Provadia | 1,145.45 mi (1,843.42 km) |
| Herstal to Radnevo | 1,120.08 mi (1,802.60 km) |
| Herstal to Radomir | 991.19 mi (1,595.17 km) |
| Herstal to Rakitovo | 1,060.67 mi (1,706.99 km) |
| Herstal to Rakovski | 1,081.87 mi (1,741.10 km) |
| Herstal to Razgrad | 1,093.77 mi (1,760.26 km) |
| Herstal to Razlog | 1,041.39 mi (1,675.95 km) |
| Herstal to Ruse | 1,059.26 mi (1,704.72 km) |
| Herstal to Samokov | 1,024.24 mi (1,648.35 km) |
| Herstal to Sandanski | 1,049.00 mi (1,688.20 km) |
| Herstal to Sevlievo | 1,056.54 mi (1,700.33 km) |
| Herstal to Shumen | 1,120.78 mi (1,803.72 km) |
| Herstal to Silistra | 1,102.94 mi (1,775.01 km) |
| Herstal to Sliven | 1,120.22 mi (1,802.83 km) |
| Herstal to Smolyan | 1,102.79 mi (1,774.76 km) |
