| San Carlos to Smolyan | 6,589.05 mi (10,604.05 km) |
| San Carlos to Sofia | 6,488.82 mi (10,442.75 km) |
| San Carlos to Sopot | 6,523.75 mi (10,498.97 km) |
| San Carlos to Sozopol | 6,600.91 mi (10,623.14 km) |
| San Carlos to Sredets | 6,594.88 mi (10,613.43 km) |
| San Carlos to Stamboliyski | 6,551.10 mi (10,542.98 km) |
| San Carlos to Stara Zagora | 6,556.90 mi (10,552.31 km) |
| San Carlos to Svilengrad | 6,610.54 mi (10,638.63 km) |
| San Carlos to Svishtov | 6,476.43 mi (10,422.80 km) |
| San Carlos to Targovishte | 6,525.35 mi (10,501.53 km) |
| San Carlos to Teteven | 6,496.49 mi (10,455.08 km) |
| San Carlos to Troyan | 6,508.49 mi (10,474.41 km) |
| San Carlos to Tryavna | 6,526.53 mi (10,503.44 km) |
| San Carlos to Tutrakan | 6,475.65 mi (10,421.55 km) |
| San Carlos to Varna | 6,554.55 mi (10,548.54 km) |
