| Mountain Ash to Dardenne Prairie (Missouri) | 4,083.67 mi (6,572.03 km) |
| Mountain Ash to Darien (Illinois) | 3,837.14 mi (6,175.28 km) |
| Mountain Ash to Davenport (Iowa) | 3,946.48 mi (6,351.25 km) |
| Mountain Ash to Davidson (North Carolina) | 3,840.61 mi (6,180.86 km) |
| Mountain Ash to Davie (Florida) | 4,276.68 mi (6,882.65 km) |
| Mountain Ash to Davis (California) | 5,182.49 mi (8,340.41 km) |
| Mountain Ash to Dayton (Nevada) | 5,075.75 mi (8,168.64 km) |
| Mountain Ash to Dayton (Ohio) | 3,778.62 mi (6,081.11 km) |
| Mountain Ash to Daytona Beach (Florida) | 4,155.27 mi (6,687.26 km) |
| Mountain Ash to De Pere (Wisconsin) | 3,719.49 mi (5,985.94 km) |
| Mountain Ash to De Witt (New York) | 3,311.09 mi (5,328.68 km) |
| Mountain Ash to Dearborn (Michigan) | 3,625.78 mi (5,835.13 km) |
| Mountain Ash to Dearborn Heights (Michigan) | 3,628.13 mi (5,838.91 km) |
| Mountain Ash to DeBary (Florida) | 4,180.53 mi (6,727.91 km) |
| Mountain Ash to Decatur (Alabama) | 4,136.35 mi (6,656.81 km) |
