| Borsbeek to Provadia | 1,204.58 mi (1,938.59 km) |
| Borsbeek to Radnevo | 1,180.60 mi (1,899.99 km) |
| Borsbeek to Radomir | 1,052.64 mi (1,694.05 km) |
| Borsbeek to Rakitovo | 1,122.04 mi (1,805.75 km) |
| Borsbeek to Rakovski | 1,142.77 mi (1,839.10 km) |
| Borsbeek to Razgrad | 1,153.02 mi (1,855.61 km) |
| Borsbeek to Razlog | 1,102.98 mi (1,775.08 km) |
| Borsbeek to Ruse | 1,118.50 mi (1,800.05 km) |
| Borsbeek to Samokov | 1,085.60 mi (1,747.10 km) |
| Borsbeek to Sandanski | 1,110.75 mi (1,787.58 km) |
| Borsbeek to Sevlievo | 1,116.87 mi (1,797.43 km) |
| Borsbeek to Shumen | 1,180.07 mi (1,899.13 km) |
| Borsbeek to Silistra | 1,161.20 mi (1,868.76 km) |
| Borsbeek to Sliven | 1,180.29 mi (1,899.50 km) |
| Borsbeek to Smolyan | 1,164.15 mi (1,873.52 km) |
