| San Juan to Smolyan | 5,421.05 mi (8,724.33 km) |
| San Juan to Sofia | 5,334.38 mi (8,584.86 km) |
| San Juan to Sopot | 5,405.25 mi (8,698.91 km) |
| San Juan to Sozopol | 5,554.40 mi (8,938.94 km) |
| San Juan to Sredets | 5,531.15 mi (8,901.52 km) |
| San Juan to Stamboliyski | 5,403.32 mi (8,695.81 km) |
| San Juan to Stara Zagora | 5,453.36 mi (8,776.34 km) |
| San Juan to Svilengrad | 5,492.60 mi (8,839.48 km) |
| San Juan to Svishtov | 5,417.99 mi (8,719.42 km) |
| San Juan to Targovishte | 5,484.30 mi (8,826.14 km) |
| San Juan to Teteven | 5,377.00 mi (8,653.44 km) |
| San Juan to Troyan | 5,399.65 mi (8,689.90 km) |
| San Juan to Tryavna | 5,438.34 mi (8,752.17 km) |
| San Juan to Tutrakan | 5,471.36 mi (8,805.30 km) |
| San Juan to Varna | 5,549.53 mi (8,931.10 km) |
