| San Sebastian de los Reyes to Smolyan | 1,470.71 mi (2,366.88 km) |
| San Sebastian de los Reyes to Sofia | 1,394.20 mi (2,243.74 km) |
| San Sebastian de los Reyes to Sopot | 1,466.40 mi (2,359.95 km) |
| San Sebastian de los Reyes to Sozopol | 1,617.43 mi (2,603.00 km) |
| San Sebastian de los Reyes to Sredets | 1,592.53 mi (2,562.94 km) |
| San Sebastian de los Reyes to Stamboliyski | 1,458.24 mi (2,346.81 km) |
| San Sebastian de los Reyes to Stara Zagora | 1,513.25 mi (2,435.35 km) |
| San Sebastian de los Reyes to Svilengrad | 1,546.08 mi (2,488.17 km) |
| San Sebastian de los Reyes to Svishtov | 1,493.21 mi (2,403.09 km) |
| San Sebastian de los Reyes to Targovishte | 1,556.22 mi (2,504.49 km) |
| San Sebastian de los Reyes to Teteven | 1,440.82 mi (2,318.77 km) |
| San Sebastian de los Reyes to Troyan | 1,463.68 mi (2,355.57 km) |
| San Sebastian de los Reyes to Tryavna | 1,503.34 mi (2,419.39 km) |
| San Sebastian de los Reyes to Tutrakan | 1,555.40 mi (2,503.18 km) |
| San Sebastian de los Reyes to Varna | 1,623.34 mi (2,612.51 km) |
