| San Luis Obispo to Smolyan | 6,691.79 mi (10,769.40 km) |
| San Luis Obispo to Sofia | 6,590.57 mi (10,606.50 km) |
| San Luis Obispo to Sopot | 6,627.80 mi (10,666.42 km) |
| San Luis Obispo to Sozopol | 6,709.61 mi (10,798.08 km) |
| San Luis Obispo to Sredets | 6,702.67 mi (10,786.91 km) |
| San Luis Obispo to Stamboliyski | 6,654.20 mi (10,708.89 km) |
| San Luis Obispo to Stara Zagora | 6,662.20 mi (10,721.78 km) |
| San Luis Obispo to Svilengrad | 6,716.03 mi (10,808.41 km) |
| San Luis Obispo to Svishtov | 6,582.55 mi (10,593.59 km) |
| San Luis Obispo to Targovishte | 6,633.08 mi (10,674.91 km) |
| San Luis Obispo to Teteven | 6,600.04 mi (10,621.74 km) |
| San Luis Obispo to Troyan | 6,612.75 mi (10,642.20 km) |
| San Luis Obispo to Tryavna | 6,632.06 mi (10,673.28 km) |
| San Luis Obispo to Tutrakan | 6,584.28 mi (10,596.37 km) |
| San Luis Obispo to Varna | 6,664.43 mi (10,725.36 km) |
