| Fort Madison to Duluth (Minnesota) | 427.08 mi (687.31 km) |
| Fort Madison to Dumas (Texas) | 662.53 mi (1,066.24 km) |
| Fort Madison to Dumont (New Jersey) | 906.93 mi (1,459.56 km) |
| Fort Madison to Duncan (Oklahoma) | 552.74 mi (889.55 km) |
| Fort Madison to Duncanville (Texas) | 631.08 mi (1,015.62 km) |
| Fort Madison to Dundalk (Maryland) | 791.52 mi (1,273.83 km) |
| Fort Madison to Dunedin (Florida) | 996.40 mi (1,603.55 km) |
| Fort Madison to Dunkirk (New York) | 634.01 mi (1,020.33 km) |
| Fort Madison to Dunmore (Pennsylvania) | 821.44 mi (1,321.97 km) |
| Fort Madison to Dunwoody (Georgia) | 601.79 mi (968.49 km) |
| Fort Madison to Durango (Colorado) | 916.35 mi (1,474.72 km) |
| Fort Madison to Durant (Oklahoma) | 534.87 mi (860.79 km) |
| Fort Madison to Durham (North Carolina) | 746.37 mi (1,201.17 km) |
| Fort Madison to Dyer (Indiana) | 209.11 mi (336.52 km) |
| Fort Madison to Dyersburg (Tennessee) | 333.62 mi (536.91 km) |
