| Boucau to Popovo | 1,384.31 mi (2,227.83 km) |
| Boucau to Provadia | 1,445.77 mi (2,326.74 km) |
| Boucau to Radnevo | 1,383.85 mi (2,227.09 km) |
| Boucau to Radomir | 1,231.48 mi (1,981.87 km) |
| Boucau to Rakitovo | 1,296.49 mi (2,086.51 km) |
| Boucau to Rakovski | 1,335.78 mi (2,149.74 km) |
| Boucau to Razgrad | 1,396.13 mi (2,246.85 km) |
| Boucau to Razlog | 1,267.28 mi (2,039.49 km) |
| Boucau to Ruse | 1,365.16 mi (2,197.02 km) |
| Boucau to Samokov | 1,264.71 mi (2,035.35 km) |
| Boucau to Sandanski | 1,263.33 mi (2,033.13 km) |
| Boucau to Sevlievo | 1,332.84 mi (2,145.00 km) |
| Boucau to Shumen | 1,419.75 mi (2,284.87 km) |
| Boucau to Silistra | 1,426.38 mi (2,295.53 km) |
| Boucau to Sliven | 1,398.07 mi (2,249.98 km) |
