| Rancho Santa Margarita to Smolyan | 6,715.18 mi (10,807.03 km) |
| Rancho Santa Margarita to Sofia | 6,612.77 mi (10,642.22 km) |
| Rancho Santa Margarita to Sopot | 6,653.20 mi (10,707.29 km) |
| Rancho Santa Margarita to Sozopol | 6,741.56 mi (10,849.48 km) |
| Rancho Santa Margarita to Sredets | 6,733.32 mi (10,836.23 km) |
| Rancho Santa Margarita to Stamboliyski | 6,678.17 mi (10,747.47 km) |
| Rancho Santa Margarita to Stara Zagora | 6,689.32 mi (10,765.43 km) |
| Rancho Santa Margarita to Svilengrad | 6,743.31 mi (10,852.30 km) |
| Rancho Santa Margarita to Svishtov | 6,611.03 mi (10,639.43 km) |
| Rancho Santa Margarita to Targovishte | 6,663.78 mi (10,724.32 km) |
| Rancho Santa Margarita to Teteven | 6,624.79 mi (10,661.57 km) |
| Rancho Santa Margarita to Troyan | 6,638.49 mi (10,683.61 km) |
| Rancho Santa Margarita to Tryavna | 6,659.59 mi (10,717.57 km) |
| Rancho Santa Margarita to Tutrakan | 6,616.41 mi (10,648.08 km) |
| Rancho Santa Margarita to Varna | 6,698.19 mi (10,779.70 km) |
