| California to Sestu | 4,418.06 mi (7,110.19 km) |
| California to Settimo Torinese | 4,170.26 mi (6,711.38 km) |
| California to Seveso | 4,214.29 mi (6,782.24 km) |
| California to Sezze | 4,523.64 mi (7,280.09 km) |
| California to Siano | 4,621.04 mi (7,436.85 km) |
| California to Siena | 4,384.64 mi (7,056.39 km) |
| California to Signa | 4,359.08 mi (7,015.27 km) |
| California to Silea | 4,349.43 mi (6,999.72 km) |
| California to Silvi Paese | 4,533.34 mi (7,295.71 km) |
| California to Sinalunga | 4,405.73 mi (7,090.34 km) |
| California to Siniscola | 4,402.90 mi (7,085.79 km) |
| California to Sinnai | 4,423.14 mi (7,118.35 km) |
| California to Siracusa | 4,785.58 mi (7,701.64 km) |
| California to Solaro | 4,212.85 mi (6,779.93 km) |
| California to Soliera | 4,320.28 mi (6,952.82 km) |
