| Potomac to Dover (New Hampshire) | 436.94 mi (703.19 km) |
| Potomac to Dover (New Jersey) | 190.24 mi (306.17 km) |
| Potomac to Dover (Ohio) | 250.54 mi (403.20 km) |
| Potomac to Downers Grove (Illinois) | 600.47 mi (966.36 km) |
| Potomac to Downey (California) | 2,281.87 mi (3,672.32 km) |
| Potomac to Dranesville (Virginia) | 9.48 mi (15.26 km) |
| Potomac to Draper (Utah) | 1,832.39 mi (2,948.94 km) |
| Potomac to Drexel Heights (Arizona) | 1,948.56 mi (3,135.91 km) |
| Potomac to Drexel Hill (Pennsylvania) | 119.75 mi (192.72 km) |
| Potomac to Duarte (California) | 2,266.74 mi (3,647.96 km) |
| Potomac to Dublin (California) | 2,398.72 mi (3,860.37 km) |
| Potomac to Dublin (Georgia) | 550.76 mi (886.36 km) |
| Potomac to Dublin (Ohio) | 325.86 mi (524.42 km) |
| Potomac to Dubuque (Iowa) | 746.11 mi (1,200.75 km) |
| Potomac to Duluth (Georgia) | 518.29 mi (834.11 km) |
