| Fort Madison to South Plainfield (New Jersey) | 887.12 mi (1,427.68 km) |
| Fort Madison to South Portland (Maine) | 1,096.02 mi (1,763.87 km) |
| Fort Madison to South Riding (Virginia) | 743.53 mi (1,196.59 km) |
| Fort Madison to South River (New Jersey) | 889.98 mi (1,432.29 km) |
| Fort Madison to South Salt Lake (Utah) | 1,074.47 mi (1,729.20 km) |
| Fort Madison to South San Francisco (California) | 1,668.83 mi (2,685.72 km) |
| Fort Madison to South San Jose Hills (California) | 1,522.11 mi (2,449.60 km) |
| Fort Madison to South Sioux City (Nebraska) | 290.99 mi (468.30 km) |
| Fort Madison to South St. Paul (Minnesota) | 307.02 mi (494.10 km) |
| Fort Madison to South Valley (New Mexico) | 920.56 mi (1,481.50 km) |
| Fort Madison to South Venice (Florida) | 1,067.63 mi (1,718.19 km) |
| Fort Madison to South Whittier (California) | 1,531.01 mi (2,463.92 km) |
| Fort Madison to South Yarmouth (Massachusetts) | 1,100.08 mi (1,770.41 km) |
| Fort Madison to Southaven (Mississippi) | 398.80 mi (641.80 km) |
| Fort Madison to Southchase (Florida) | 1,016.78 mi (1,636.34 km) |
