| West Carson to Smolyan | 6,721.69 mi (10,817.51 km) |
| West Carson to Sofia | 6,619.50 mi (10,653.05 km) |
| West Carson to Sopot | 6,659.29 mi (10,717.09 km) |
| West Carson to Sozopol | 6,746.34 mi (10,857.19 km) |
| West Carson to Sredets | 6,738.37 mi (10,844.36 km) |
| West Carson to Stamboliyski | 6,684.55 mi (10,757.75 km) |
| West Carson to Stara Zagora | 6,695.08 mi (10,774.68 km) |
| West Carson to Svilengrad | 6,749.04 mi (10,861.53 km) |
| West Carson to Svishtov | 6,616.49 mi (10,648.21 km) |
| West Carson to Targovishte | 6,668.80 mi (10,732.40 km) |
| West Carson to Teteven | 6,631.01 mi (10,671.58 km) |
| West Carson to Troyan | 6,644.51 mi (10,693.30 km) |
| West Carson to Tryavna | 6,665.25 mi (10,726.69 km) |
| West Carson to Tutrakan | 6,621.13 mi (10,655.68 km) |
| West Carson to Varna | 6,702.60 mi (10,786.79 km) |
