| Howard to Dover (New Hampshire) | 860.69 mi (1,385.15 km) |
| Howard to Dover (New Jersey) | 731.44 mi (1,177.14 km) |
| Howard to Dover (Ohio) | 436.99 mi (703.27 km) |
| Howard to Downers Grove (Illinois) | 191.80 mi (308.67 km) |
| Howard to Downey (California) | 1,753.91 mi (2,822.64 km) |
| Howard to Dranesville (Virginia) | 672.60 mi (1,082.45 km) |
| Howard to Draper (Utah) | 1,237.65 mi (1,991.81 km) |
| Howard to Drexel Heights (Arizona) | 1,502.75 mi (2,418.44 km) |
| Howard to Drexel Hill (Pennsylvania) | 726.64 mi (1,169.42 km) |
| Howard to Duarte (California) | 1,736.76 mi (2,795.05 km) |
| Howard to Dublin (California) | 1,807.29 mi (2,908.56 km) |
| Howard to Dublin (Georgia) | 876.58 mi (1,410.73 km) |
| Howard to Dublin (Ohio) | 398.29 mi (640.98 km) |
| Howard to Dubuque (Iowa) | 193.90 mi (312.04 km) |
| Howard to Duluth (Georgia) | 759.57 mi (1,222.41 km) |
