| Boechout to Provadia | 1,203.50 mi (1,936.85 km) |
| Boechout to Radnevo | 1,179.25 mi (1,897.83 km) |
| Boechout to Radomir | 1,051.05 mi (1,691.50 km) |
| Boechout to Rakitovo | 1,120.48 mi (1,803.24 km) |
| Boechout to Rakovski | 1,141.33 mi (1,836.80 km) |
| Boechout to Razgrad | 1,151.92 mi (1,853.83 km) |
| Boechout to Razlog | 1,101.35 mi (1,772.45 km) |
| Boechout to Ruse | 1,117.40 mi (1,798.27 km) |
| Boechout to Samokov | 1,084.04 mi (1,744.59 km) |
| Boechout to Sandanski | 1,109.06 mi (1,784.86 km) |
| Boechout to Sevlievo | 1,115.56 mi (1,795.32 km) |
| Boechout to Shumen | 1,178.96 mi (1,897.35 km) |
| Boechout to Silistra | 1,160.25 mi (1,867.24 km) |
| Boechout to Sliven | 1,179.04 mi (1,897.48 km) |
| Boechout to Smolyan | 1,162.59 mi (1,871.01 km) |
