| Rhondda to Dardenne Prairie (Missouri) | 4,084.08 mi (6,572.69 km) |
| Rhondda to Darien (Illinois) | 3,837.63 mi (6,176.06 km) |
| Rhondda to Davenport (Iowa) | 3,947.09 mi (6,352.22 km) |
| Rhondda to Davidson (North Carolina) | 3,840.24 mi (6,180.27 km) |
| Rhondda to Davie (Florida) | 4,275.63 mi (6,880.96 km) |
| Rhondda to Davis (California) | 5,184.49 mi (8,343.63 km) |
| Rhondda to Dayton (Nevada) | 5,077.68 mi (8,171.74 km) |
| Rhondda to Dayton (Ohio) | 3,778.76 mi (6,081.33 km) |
| Rhondda to Daytona Beach (Florida) | 4,154.47 mi (6,685.98 km) |
| Rhondda to De Pere (Wisconsin) | 3,720.18 mi (5,987.06 km) |
| Rhondda to De Witt (New York) | 3,311.09 mi (5,328.68 km) |
| Rhondda to Dearborn (Michigan) | 3,626.07 mi (5,835.60 km) |
| Rhondda to Dearborn Heights (Michigan) | 3,628.43 mi (5,839.39 km) |
| Rhondda to DeBary (Florida) | 4,179.72 mi (6,726.62 km) |
| Rhondda to Decatur (Alabama) | 4,136.26 mi (6,656.67 km) |
