| Mason City to South Plainfield (New Jersey) | 980.65 mi (1,578.21 km) |
| Mason City to South Portland (Maine) | 1,147.15 mi (1,846.15 km) |
| Mason City to South Riding (Virginia) | 866.81 mi (1,395.00 km) |
| Mason City to South River (New Jersey) | 985.10 mi (1,585.37 km) |
| Mason City to South Salt Lake (Utah) | 973.79 mi (1,567.17 km) |
| Mason City to South San Francisco (California) | 1,574.91 mi (2,534.57 km) |
| Mason City to South San Jose Hills (California) | 1,468.73 mi (2,363.70 km) |
| Mason City to South Sioux City (Nebraska) | 169.60 mi (272.95 km) |
| Mason City to South St. Paul (Minnesota) | 120.41 mi (193.78 km) |
| Mason City to South Valley (New Mexico) | 914.11 mi (1,471.12 km) |
| Mason City to South Venice (Florida) | 1,266.21 mi (2,037.78 km) |
| Mason City to South Whittier (California) | 1,477.79 mi (2,378.28 km) |
| Mason City to South Yarmouth (Massachusetts) | 1,174.04 mi (1,889.43 km) |
| Mason City to Southaven (Mississippi) | 592.03 mi (952.78 km) |
| Mason City to Southchase (Florida) | 1,213.65 mi (1,953.18 km) |
