| Fountain Valley to Smolyan | 6,719.66 mi (10,814.24 km) |
| Fountain Valley to Sofia | 6,617.35 mi (10,649.60 km) |
| Fountain Valley to Sopot | 6,657.47 mi (10,714.17 km) |
| Fountain Valley to Sozopol | 6,745.18 mi (10,855.33 km) |
| Fountain Valley to Sredets | 6,737.08 mi (10,842.28 km) |
| Fountain Valley to Stamboliyski | 6,682.59 mi (10,754.58 km) |
| Fountain Valley to Stara Zagora | 6,693.43 mi (10,772.03 km) |
| Fountain Valley to Svilengrad | 6,747.40 mi (10,858.90 km) |
| Fountain Valley to Svishtov | 6,614.99 mi (10,645.80 km) |
| Fountain Valley to Targovishte | 6,667.53 mi (10,730.35 km) |
| Fountain Valley to Teteven | 6,629.13 mi (10,668.55 km) |
| Fountain Valley to Troyan | 6,642.72 mi (10,690.43 km) |
| Fountain Valley to Tryavna | 6,663.65 mi (10,724.11 km) |
| Fountain Valley to Tutrakan | 6,620.01 mi (10,653.87 km) |
| Fountain Valley to Varna | 6,701.63 mi (10,785.24 km) |
