| Tudela de Duero to Smolyan | 1,505.87 mi (2,423.46 km) |
| Tudela de Duero to Sofia | 1,425.44 mi (2,294.02 km) |
| Tudela de Duero to Sopot | 1,497.47 mi (2,409.95 km) |
| Tudela de Duero to Sozopol | 1,648.43 mi (2,652.89 km) |
| Tudela de Duero to Sredets | 1,623.95 mi (2,613.49 km) |
| Tudela de Duero to Stamboliyski | 1,491.37 mi (2,400.12 km) |
| Tudela de Duero to Stara Zagora | 1,544.88 mi (2,486.24 km) |
| Tudela de Duero to Svilengrad | 1,579.96 mi (2,542.69 km) |
| Tudela de Duero to Svishtov | 1,520.39 mi (2,446.83 km) |
| Tudela de Duero to Targovishte | 1,584.53 mi (2,550.06 km) |
| Tudela de Duero to Teteven | 1,470.96 mi (2,367.29 km) |
| Tudela de Duero to Troyan | 1,493.85 mi (2,404.13 km) |
| Tudela de Duero to Tryavna | 1,533.37 mi (2,467.72 km) |
| Tudela de Duero to Tutrakan | 1,580.72 mi (2,543.93 km) |
| Tudela de Duero to Varna | 1,651.44 mi (2,657.73 km) |
