| San Martin de Valdeiglesias to Smolyan | 1,513.23 mi (2,435.31 km) |
| San Martin de Valdeiglesias to Sofia | 1,436.84 mi (2,312.37 km) |
| San Martin de Valdeiglesias to Sopot | 1,509.05 mi (2,428.58 km) |
| San Martin de Valdeiglesias to Sozopol | 1,660.07 mi (2,671.63 km) |
| San Martin de Valdeiglesias to Sredets | 1,635.17 mi (2,631.55 km) |
| San Martin de Valdeiglesias to Stamboliyski | 1,500.84 mi (2,415.37 km) |
| San Martin de Valdeiglesias to Stara Zagora | 1,555.89 mi (2,503.96 km) |
| San Martin de Valdeiglesias to Svilengrad | 1,588.65 mi (2,556.68 km) |
| San Martin de Valdeiglesias to Svishtov | 1,535.87 mi (2,471.75 km) |
| San Martin de Valdeiglesias to Targovishte | 1,598.88 mi (2,573.16 km) |
| San Martin de Valdeiglesias to Teteven | 1,483.48 mi (2,387.42 km) |
| San Martin de Valdeiglesias to Troyan | 1,506.34 mi (2,424.23 km) |
| San Martin de Valdeiglesias to Tryavna | 1,546.00 mi (2,488.05 km) |
| San Martin de Valdeiglesias to Tutrakan | 1,598.05 mi (2,571.81 km) |
| San Martin de Valdeiglesias to Varna | 1,666.01 mi (2,681.18 km) |
