| Sonseca to Popovo | 1,572.73 mi (2,531.07 km) |
| Sonseca to Provadia | 1,633.43 mi (2,628.75 km) |
| Sonseca to Radnevo | 1,560.50 mi (2,511.39 km) |
| Sonseca to Radomir | 1,407.78 mi (2,265.61 km) |
| Sonseca to Rakitovo | 1,467.17 mi (2,361.19 km) |
| Sonseca to Rakovski | 1,511.16 mi (2,431.98 km) |
| Sonseca to Razgrad | 1,586.71 mi (2,553.57 km) |
| Sonseca to Razlog | 1,435.92 mi (2,310.89 km) |
| Sonseca to Ruse | 1,558.45 mi (2,508.09 km) |
| Sonseca to Samokov | 1,439.04 mi (2,315.91 km) |
| Sonseca to Sandanski | 1,427.77 mi (2,297.77 km) |
| Sonseca to Sevlievo | 1,516.79 mi (2,441.04 km) |
| Sonseca to Shumen | 1,608.03 mi (2,587.87 km) |
| Sonseca to Silistra | 1,623.45 mi (2,612.68 km) |
| Sonseca to Sliven | 1,579.39 mi (2,541.78 km) |
