| Mountain Ash to Decatur (Georgia) | 4,065.16 mi (6,542.25 km) |
| Mountain Ash to Decatur (Illinois) | 3,961.64 mi (6,375.64 km) |
| Mountain Ash to Deer Park (New York) | 3,294.04 mi (5,301.25 km) |
| Mountain Ash to Deer Park (Texas) | 4,708.25 mi (7,577.19 km) |
| Mountain Ash to Deerfield (Illinois) | 3,812.89 mi (6,136.26 km) |
| Mountain Ash to Deerfield Beach (Florida) | 4,258.53 mi (6,853.45 km) |
| Mountain Ash to Defiance (Ohio) | 3,717.12 mi (5,982.12 km) |
| Mountain Ash to DeForest (Wisconsin) | 3,821.36 mi (6,149.88 km) |
| Mountain Ash to DeKalb (Illinois) | 3,858.06 mi (6,208.96 km) |
| Mountain Ash to Del Aire (California) | 5,338.62 mi (8,591.68 km) |
| Mountain Ash to Del City (Oklahoma) | 4,505.75 mi (7,251.31 km) |
| Mountain Ash to Del Rio (Texas) | 4,952.85 mi (7,970.84 km) |
| Mountain Ash to DeLand (Florida) | 4,172.00 mi (6,714.19 km) |
| Mountain Ash to Delano (California) | 5,263.27 mi (8,470.41 km) |
| Mountain Ash to Delaware (Ohio) | 3,710.81 mi (5,971.97 km) |
