| Bierbeek to Provadia | 1,185.03 mi (1,907.12 km) |
| Bierbeek to Radnevo | 1,159.47 mi (1,865.99 km) |
| Bierbeek to Radomir | 1,030.15 mi (1,657.86 km) |
| Bierbeek to Rakitovo | 1,099.68 mi (1,769.77 km) |
| Bierbeek to Rakovski | 1,121.13 mi (1,804.28 km) |
| Bierbeek to Razgrad | 1,133.36 mi (1,823.96 km) |
| Bierbeek to Razlog | 1,080.22 mi (1,738.44 km) |
| Bierbeek to Ruse | 1,098.85 mi (1,768.42 km) |
| Bierbeek to Samokov | 1,063.25 mi (1,711.14 km) |
| Bierbeek to Sandanski | 1,087.65 mi (1,750.40 km) |
| Bierbeek to Sevlievo | 1,095.98 mi (1,763.80 km) |
| Bierbeek to Shumen | 1,160.36 mi (1,867.42 km) |
| Bierbeek to Silistra | 1,142.52 mi (1,838.71 km) |
| Bierbeek to Sliven | 1,159.71 mi (1,866.38 km) |
| Bierbeek to Smolyan | 1,141.79 mi (1,837.53 km) |
