| Oud-Heverlee to Provadia | 1,189.19 mi (1,913.82 km) |
| Oud-Heverlee to Radnevo | 1,163.51 mi (1,872.48 km) |
| Oud-Heverlee to Radomir | 1,034.05 mi (1,664.14 km) |
| Oud-Heverlee to Rakitovo | 1,103.60 mi (1,776.07 km) |
| Oud-Heverlee to Rakovski | 1,125.12 mi (1,810.70 km) |
| Oud-Heverlee to Razgrad | 1,137.51 mi (1,830.64 km) |
| Oud-Heverlee to Razlog | 1,084.09 mi (1,744.67 km) |
| Oud-Heverlee to Ruse | 1,103.00 mi (1,775.11 km) |
| Oud-Heverlee to Samokov | 1,067.17 mi (1,717.45 km) |
| Oud-Heverlee to Sandanski | 1,091.47 mi (1,756.56 km) |
| Oud-Heverlee to Sevlievo | 1,100.04 mi (1,770.34 km) |
| Oud-Heverlee to Shumen | 1,164.51 mi (1,874.10 km) |
| Oud-Heverlee to Silistra | 1,146.73 mi (1,845.49 km) |
| Oud-Heverlee to Sliven | 1,163.80 mi (1,872.95 km) |
| Oud-Heverlee to Smolyan | 1,145.71 mi (1,843.84 km) |
