| Fountain Valley to Sestu | 6,362.02 mi (10,238.68 km) |
| Fountain Valley to Settimo Torinese | 6,017.37 mi (9,684.02 km) |
| Fountain Valley to Seveso | 6,035.80 mi (9,713.68 km) |
| Fountain Valley to Sezze | 6,381.29 mi (10,269.69 km) |
| Fountain Valley to Siano | 6,471.63 mi (10,415.08 km) |
| Fountain Valley to Siena | 6,228.04 mi (10,023.07 km) |
| Fountain Valley to Signa | 6,196.02 mi (9,971.52 km) |
| Fountain Valley to Silea | 6,134.36 mi (9,872.29 km) |
| Fountain Valley to Silvi Paese | 6,358.12 mi (10,232.40 km) |
| Fountain Valley to Sinalunga | 6,246.41 mi (10,052.62 km) |
| Fountain Valley to Siniscola | 6,317.16 mi (10,166.48 km) |
| Fountain Valley to Sinnai | 6,365.81 mi (10,244.77 km) |
| Fountain Valley to Siracusa | 6,695.19 mi (10,774.88 km) |
| Fountain Valley to Solaro | 6,035.55 mi (9,713.27 km) |
| Fountain Valley to Soliera | 6,140.09 mi (9,881.52 km) |
