| Fort Madison to Indianola (Iowa) | 126.35 mi (203.34 km) |
| Fort Madison to Indio (California) | 1,444.26 mi (2,324.31 km) |
| Fort Madison to Inglewood (California) | 1,546.56 mi (2,488.95 km) |
| Fort Madison to Inkster (Michigan) | 431.69 mi (694.73 km) |
| Fort Madison to Inver Grove Heights (Minnesota) | 303.12 mi (487.83 km) |
| Fort Madison to Inwood (New York) | 921.48 mi (1,482.98 km) |
| Fort Madison to Iona (Florida) | 1,112.82 mi (1,790.91 km) |
| Fort Madison to Ionia (Michigan) | 361.92 mi (582.46 km) |
| Fort Madison to Iowa City (Iowa) | 72.13 mi (116.09 km) |
| Fort Madison to Irmo (South Carolina) | 716.01 mi (1,152.31 km) |
| Fort Madison to Irondale (Alabama) | 552.88 mi (889.77 km) |
| Fort Madison to Ironton (Ohio) | 483.65 mi (778.36 km) |
| Fort Madison to Irvine (California) | 1,525.37 mi (2,454.85 km) |
| Fort Madison to Irving (Texas) | 619.70 mi (997.31 km) |
| Fort Madison to Isabela (Puerto Rico) | 2,100.83 mi (3,380.95 km) |
