| Castilleja de la Cuesta to Smolyan | 1,656.22 mi (2,665.43 km) |
| Castilleja de la Cuesta to Sofia | 1,588.26 mi (2,556.06 km) |
| Castilleja de la Cuesta to Sopot | 1,660.14 mi (2,671.73 km) |
| Castilleja de la Cuesta to Sozopol | 1,810.04 mi (2,912.97 km) |
| Castilleja de la Cuesta to Sredets | 1,784.54 mi (2,871.94 km) |
| Castilleja de la Cuesta to Stamboliyski | 1,648.00 mi (2,652.21 km) |
| Castilleja de la Cuesta to Stara Zagora | 1,705.50 mi (2,744.73 km) |
| Castilleja de la Cuesta to Svilengrad | 1,733.54 mi (2,789.86 km) |
| Castilleja de la Cuesta to Svishtov | 1,693.93 mi (2,726.12 km) |
| Castilleja de la Cuesta to Targovishte | 1,754.38 mi (2,823.40 km) |
| Castilleja de la Cuesta to Teteven | 1,636.53 mi (2,633.74 km) |
| Castilleja de la Cuesta to Troyan | 1,659.15 mi (2,670.15 km) |
| Castilleja de la Cuesta to Tryavna | 1,698.73 mi (2,733.84 km) |
| Castilleja de la Cuesta to Tutrakan | 1,758.94 mi (2,830.74 km) |
| Castilleja de la Cuesta to Varna | 1,821.41 mi (2,931.27 km) |
