| San Marino to Security-Widefield (Colorado) | 809.47 mi (1,302.71 km) |
| San Marino to Sedalia (Missouri) | 1,414.41 mi (2,276.27 km) |
| San Marino to Sedro-Woolley (Washington) | 1,016.49 mi (1,635.88 km) |
| San Marino to Seguin (Texas) | 1,220.76 mi (1,964.63 km) |
| San Marino to Selden (New York) | 2,486.09 mi (4,000.97 km) |
| San Marino to Selma (Alabama) | 1,792.40 mi (2,884.60 km) |
| San Marino to Selma (California) | 189.18 mi (304.45 km) |
| San Marino to Selma (Texas) | 1,201.32 mi (1,933.34 km) |
| San Marino to Seminole (Florida) | 2,126.23 mi (3,421.83 km) |
| San Marino to Seven Hills (Ohio) | 2,036.77 mi (3,277.86 km) |
| San Marino to Seven Oaks (South Carolina) | 2,103.70 mi (3,385.58 km) |
| San Marino to Severn (Maryland) | 2,302.40 mi (3,705.36 km) |
| San Marino to Severna Park (Maryland) | 2,309.45 mi (3,716.71 km) |
| San Marino to Sevierville (Tennessee) | 1,948.74 mi (3,136.19 km) |
| San Marino to Seymour (Indiana) | 1,809.89 mi (2,912.73 km) |
