| Valley Center to Smolyan | 6,723.98 mi (10,821.20 km) |
| Valley Center to Sofia | 6,621.36 mi (10,656.06 km) |
| Valley Center to Sopot | 6,662.44 mi (10,722.16 km) |
| Valley Center to Sozopol | 6,752.11 mi (10,866.47 km) |
| Valley Center to Sredets | 6,743.61 mi (10,852.79 km) |
| Valley Center to Stamboliyski | 6,687.10 mi (10,761.86 km) |
| Valley Center to Stara Zagora | 6,698.90 mi (10,780.85 km) |
| Valley Center to Svilengrad | 6,752.90 mi (10,867.74 km) |
| Valley Center to Svishtov | 6,620.92 mi (10,655.34 km) |
| Valley Center to Targovishte | 6,674.11 mi (10,740.94 km) |
| Valley Center to Teteven | 6,633.91 mi (10,676.24 km) |
| Valley Center to Troyan | 6,647.80 mi (10,698.60 km) |
| Valley Center to Tryavna | 6,669.26 mi (10,733.14 km) |
| Valley Center to Tutrakan | 6,627.05 mi (10,665.20 km) |
| Valley Center to Varna | 6,709.14 mi (10,797.31 km) |
