| San Marcos to Smolyan | 6,734.24 mi (10,837.72 km) |
| San Marcos to Sofia | 6,631.65 mi (10,672.61 km) |
| San Marcos to Sopot | 6,672.65 mi (10,738.60 km) |
| San Marcos to Sozopol | 6,762.16 mi (10,882.65 km) |
| San Marcos to Sredets | 6,753.69 mi (10,869.02 km) |
| San Marcos to Stamboliyski | 6,697.35 mi (10,778.35 km) |
| San Marcos to Stara Zagora | 6,709.08 mi (10,797.22 km) |
| San Marcos to Svilengrad | 6,763.07 mi (10,884.11 km) |
| San Marcos to Svishtov | 6,631.05 mi (10,671.65 km) |
| San Marcos to Targovishte | 6,684.19 mi (10,757.16 km) |
| San Marcos to Teteven | 6,644.14 mi (10,692.70 km) |
| San Marcos to Troyan | 6,658.00 mi (10,715.02 km) |
| San Marcos to Tryavna | 6,679.43 mi (10,749.50 km) |
| San Marcos to Tutrakan | 6,637.09 mi (10,681.36 km) |
| San Marcos to Varna | 6,719.14 mi (10,813.41 km) |
