| Mountain Ash to Dumas (Texas) | 4,655.53 mi (7,492.35 km) |
| Mountain Ash to Dumont (New Jersey) | 3,313.86 mi (5,333.14 km) |
| Mountain Ash to Duncan (Oklahoma) | 4,570.27 mi (7,355.15 km) |
| Mountain Ash to Duncanville (Texas) | 4,627.84 mi (7,447.79 km) |
| Mountain Ash to Dundalk (Maryland) | 3,489.40 mi (5,615.65 km) |
| Mountain Ash to Dunedin (Florida) | 4,284.36 mi (6,895.02 km) |
| Mountain Ash to Dunkirk (New York) | 3,464.72 mi (5,575.93 km) |
| Mountain Ash to Dunmore (Pennsylvania) | 3,359.94 mi (5,407.30 km) |
| Mountain Ash to Dunwoody (Georgia) | 4,057.58 mi (6,530.05 km) |
| Mountain Ash to Durango (Colorado) | 4,796.38 mi (7,719.03 km) |
| Mountain Ash to Durant (Oklahoma) | 4,538.84 mi (7,304.56 km) |
| Mountain Ash to Durham (North Carolina) | 3,737.99 mi (6,015.71 km) |
| Mountain Ash to Dyer (Indiana) | 3,830.15 mi (6,164.04 km) |
| Mountain Ash to Dyersburg (Tennessee) | 4,160.85 mi (6,696.24 km) |
| Mountain Ash to Eagan (Minnesota) | 3,890.84 mi (6,261.71 km) |
