| Potomac to Dixon (California) | 2,381.23 mi (3,832.22 km) |
| Potomac to Dixon (Illinois) | 674.36 mi (1,085.28 km) |
| Potomac to Dobbs Ferry (New York) | 223.62 mi (359.89 km) |
| Potomac to Doctor Phillips (Florida) | 770.44 mi (1,239.91 km) |
| Potomac to Dodge City (Kansas) | 1,235.86 mi (1,988.93 km) |
| Potomac to Dolton (Illinois) | 576.61 mi (927.96 km) |
| Potomac to Donna (Texas) | 1,498.99 mi (2,412.39 km) |
| Potomac to Dorado (Puerto Rico) | 1,563.39 mi (2,516.04 km) |
| Potomac to Doral (Florida) | 930.24 mi (1,497.08 km) |
| Potomac to Doraville (Georgia) | 528.02 mi (849.77 km) |
| Potomac to Dothan (Alabama) | 709.54 mi (1,141.90 km) |
| Potomac to Douglas (Arizona) | 1,890.32 mi (3,042.17 km) |
| Potomac to Douglas (Georgia) | 608.81 mi (979.79 km) |
| Potomac to Douglasville (Georgia) | 554.12 mi (891.77 km) |
| Potomac to Dover (Delaware) | 90.35 mi (145.41 km) |
