| Kasterlee to Provadia | 1,186.58 mi (1,909.61 km) |
| Kasterlee to Radnevo | 1,163.45 mi (1,872.39 km) |
| Kasterlee to Radomir | 1,036.40 mi (1,667.93 km) |
| Kasterlee to Rakitovo | 1,105.70 mi (1,779.46 km) |
| Kasterlee to Rakovski | 1,125.94 mi (1,812.02 km) |
| Kasterlee to Razgrad | 1,135.07 mi (1,826.73 km) |
| Kasterlee to Razlog | 1,086.95 mi (1,749.27 km) |
| Kasterlee to Ruse | 1,100.55 mi (1,771.17 km) |
| Kasterlee to Samokov | 1,069.25 mi (1,720.80 km) |
| Kasterlee to Sandanski | 1,094.99 mi (1,762.21 km) |
| Kasterlee to Sevlievo | 1,099.58 mi (1,769.61 km) |
| Kasterlee to Shumen | 1,162.14 mi (1,870.28 km) |
| Kasterlee to Silistra | 1,142.80 mi (1,839.16 km) |
| Kasterlee to Sliven | 1,162.82 mi (1,871.39 km) |
| Kasterlee to Smolyan | 1,147.81 mi (1,847.22 km) |
