| Rhondda to Dover (New Jersey) | 3,339.42 mi (5,374.27 km) |
| Rhondda to Dover (Ohio) | 3,636.13 mi (5,851.78 km) |
| Rhondda to Downers Grove (Illinois) | 3,836.69 mi (6,174.55 km) |
| Rhondda to Downey (California) | 5,331.15 mi (8,579.65 km) |
| Rhondda to Dranesville (Virginia) | 3,537.27 mi (5,692.69 km) |
| Rhondda to Draper (Utah) | 4,761.99 mi (7,663.68 km) |
| Rhondda to Drexel Heights (Arizona) | 5,186.03 mi (8,346.11 km) |
| Rhondda to Drexel Hill (Pennsylvania) | 3,410.34 mi (5,488.42 km) |
| Rhondda to Duarte (California) | 5,312.59 mi (8,549.79 km) |
| Rhondda to Dublin (California) | 5,237.24 mi (8,428.53 km) |
| Rhondda to Dublin (Georgia) | 4,067.96 mi (6,546.74 km) |
| Rhondda to Dublin (Ohio) | 3,721.63 mi (5,989.38 km) |
| Rhondda to Dubuque (Iowa) | 3,907.16 mi (6,287.97 km) |
| Rhondda to Duluth (Georgia) | 4,047.54 mi (6,513.89 km) |
| Rhondda to Duluth (Minnesota) | 3,765.74 mi (6,060.37 km) |
