| Howard to Duluth (Minnesota) | 247.70 mi (398.64 km) |
| Howard to Dumas (Texas) | 945.18 mi (1,521.13 km) |
| Howard to Dumont (New Jersey) | 756.72 mi (1,217.82 km) |
| Howard to Duncan (Oklahoma) | 867.15 mi (1,395.54 km) |
| Howard to Duncanville (Texas) | 950.26 mi (1,529.30 km) |
| Howard to Dundalk (Maryland) | 698.75 mi (1,124.52 km) |
| Howard to Dunedin (Florida) | 1,179.53 mi (1,898.27 km) |
| Howard to Dunkirk (New York) | 461.75 mi (743.11 km) |
| Howard to Dunmore (Pennsylvania) | 666.77 mi (1,073.06 km) |
| Howard to Dunwoody (Georgia) | 761.47 mi (1,225.46 km) |
| Howard to Durango (Colorado) | 1,145.64 mi (1,843.74 km) |
| Howard to Durant (Oklahoma) | 853.87 mi (1,374.17 km) |
| Howard to Durham (North Carolina) | 765.16 mi (1,231.41 km) |
| Howard to Dyer (Indiana) | 214.33 mi (344.93 km) |
| Howard to Dyersburg (Tennessee) | 592.79 mi (954.01 km) |
