| San Mateo to Somersworth (New Hampshire) | 2,691.37 mi (4,331.34 km) |
| San Mateo to Somerton (Arizona) | 549.51 mi (884.35 km) |
| San Mateo to Somerville (Massachusetts) | 2,691.05 mi (4,330.83 km) |
| San Mateo to Somerville (New Jersey) | 2,536.41 mi (4,081.96 km) |
| San Mateo to Sonoma (California) | 51.62 mi (83.08 km) |
| San Mateo to Soquel (California) | 43.21 mi (69.54 km) |
| San Mateo to South Bend (Indiana) | 1,925.20 mi (3,098.31 km) |
| San Mateo to South Bradenton (Florida) | 2,398.01 mi (3,859.23 km) |
| San Mateo to South Burlington (Vermont) | 2,564.31 mi (4,126.87 km) |
| San Mateo to South Charleston (West Virginia) | 2,194.54 mi (3,531.76 km) |
| San Mateo to South Daytona (Florida) | 2,432.68 mi (3,915.02 km) |
| San Mateo to South El Monte (California) | 340.02 mi (547.20 km) |
| San Mateo to South Elgin (Illinois) | 1,819.09 mi (2,927.55 km) |
| San Mateo to South Euclid (Ohio) | 2,170.32 mi (3,492.80 km) |
| San Mateo to South Farmingdale (New York) | 2,594.12 mi (4,174.84 km) |
