| Fort Madison to Port Chester (New York) | 923.49 mi (1,486.22 km) |
| Fort Madison to Port Hueneme (California) | 1,585.22 mi (2,551.16 km) |
| Fort Madison to Port Huron (Michigan) | 486.87 mi (783.53 km) |
| Fort Madison to Port Lavaca (Texas) | 881.44 mi (1,418.54 km) |
| Fort Madison to Port Neches (Texas) | 749.76 mi (1,206.62 km) |
| Fort Madison to Port Orange (Florida) | 986.39 mi (1,587.44 km) |
| Fort Madison to Port Orchard (Washington) | 1,613.24 mi (2,596.26 km) |
| Fort Madison to Port Royal (South Carolina) | 820.98 mi (1,321.24 km) |
| Fort Madison to Port Salerno (Florida) | 1,127.73 mi (1,814.91 km) |
| Fort Madison to Port St. John (Florida) | 1,029.74 mi (1,657.21 km) |
| Fort Madison to Port St. Lucie (Florida) | 1,113.49 mi (1,791.98 km) |
| Fort Madison to Port Washington (New York) | 924.03 mi (1,487.08 km) |
| Fort Madison to Port Washington (Wisconsin) | 260.96 mi (419.98 km) |
| Fort Madison to Port Wentworth (Georgia) | 809.80 mi (1,303.24 km) |
| Fort Madison to Portage (Indiana) | 227.14 mi (365.55 km) |
