| Rhondda to Decatur (Georgia) | 4,064.87 mi (6,541.77 km) |
| Rhondda to Decatur (Illinois) | 3,962.03 mi (6,376.27 km) |
| Rhondda to Deer Park (New York) | 3,293.70 mi (5,300.69 km) |
| Rhondda to Deer Park (Texas) | 4,708.31 mi (7,577.29 km) |
| Rhondda to Deerfield (Illinois) | 3,813.40 mi (6,137.08 km) |
| Rhondda to Deerfield Beach (Florida) | 4,257.49 mi (6,851.77 km) |
| Rhondda to Defiance (Ohio) | 3,717.38 mi (5,982.55 km) |
| Rhondda to DeForest (Wisconsin) | 3,822.02 mi (6,150.95 km) |
| Rhondda to DeKalb (Illinois) | 3,858.60 mi (6,209.82 km) |
| Rhondda to Del Aire (California) | 5,340.23 mi (8,594.27 km) |
| Rhondda to Del City (Oklahoma) | 4,506.30 mi (7,252.19 km) |
| Rhondda to Del Rio (Texas) | 4,953.23 mi (7,971.45 km) |
| Rhondda to DeLand (Florida) | 4,171.21 mi (6,712.91 km) |
| Rhondda to Delano (California) | 5,265.02 mi (8,473.22 km) |
| Rhondda to Delaware (Ohio) | 3,710.93 mi (5,972.17 km) |
