| San Mateo to Security-Widefield (Colorado) | 958.25 mi (1,542.16 km) |
| San Mateo to Sedalia (Missouri) | 1,575.78 mi (2,535.98 km) |
| San Mateo to Sedro-Woolley (Washington) | 757.20 mi (1,218.60 km) |
| San Mateo to Seguin (Texas) | 1,500.13 mi (2,414.22 km) |
| San Mateo to Selden (New York) | 2,612.54 mi (4,204.47 km) |
| San Mateo to Selma (Alabama) | 2,016.25 mi (3,244.84 km) |
| San Mateo to Selma (California) | 163.44 mi (263.03 km) |
| San Mateo to Selma (Texas) | 1,481.88 mi (2,384.86 km) |
| San Mateo to Seminole (Florida) | 2,375.05 mi (3,822.27 km) |
| San Mateo to Seven Hills (Ohio) | 2,163.78 mi (3,482.26 km) |
| San Mateo to Seven Oaks (South Carolina) | 2,301.36 mi (3,703.69 km) |
| San Mateo to Severn (Maryland) | 2,448.12 mi (3,939.87 km) |
| San Mateo to Severna Park (Maryland) | 2,455.48 mi (3,951.72 km) |
| San Mateo to Sevierville (Tennessee) | 2,133.66 mi (3,433.79 km) |
| San Mateo to Seymour (Indiana) | 1,965.39 mi (3,162.98 km) |
