| Clearlake to Smolyan | 6,504.94 mi (10,468.69 km) |
| Clearlake to Sofia | 6,405.16 mi (10,308.11 km) |
| Clearlake to Sopot | 6,439.14 mi (10,362.80 km) |
| Clearlake to Sozopol | 6,514.41 mi (10,483.94 km) |
| Clearlake to Sredets | 6,508.74 mi (10,474.80 km) |
| Clearlake to Stamboliyski | 6,466.87 mi (10,407.41 km) |
| Clearlake to Stara Zagora | 6,471.77 mi (10,415.30 km) |
| Clearlake to Svilengrad | 6,525.31 mi (10,501.47 km) |
| Clearlake to Svishtov | 6,391.00 mi (10,285.32 km) |
| Clearlake to Targovishte | 6,439.26 mi (10,362.99 km) |
| Clearlake to Teteven | 6,412.09 mi (10,319.25 km) |
| Clearlake to Troyan | 6,423.80 mi (10,338.11 km) |
| Clearlake to Tryavna | 6,441.32 mi (10,366.30 km) |
| Clearlake to Tutrakan | 6,389.22 mi (10,282.46 km) |
| Clearlake to Varna | 6,467.61 mi (10,408.62 km) |
