| Pontypridd to Dardenne Prairie (Missouri) | 4,087.42 mi (6,578.07 km) |
| Pontypridd to Darien (Illinois) | 3,840.96 mi (6,181.43 km) |
| Pontypridd to Davenport (Iowa) | 3,950.41 mi (6,357.56 km) |
| Pontypridd to Davidson (North Carolina) | 3,843.62 mi (6,185.70 km) |
| Pontypridd to Davie (Florida) | 4,278.97 mi (6,886.33 km) |
| Pontypridd to Davis (California) | 5,187.47 mi (8,348.43 km) |
| Pontypridd to Dayton (Nevada) | 5,080.69 mi (8,176.58 km) |
| Pontypridd to Dayton (Ohio) | 3,782.13 mi (6,086.75 km) |
| Pontypridd to Daytona Beach (Florida) | 4,157.83 mi (6,691.39 km) |
| Pontypridd to De Pere (Wisconsin) | 3,723.49 mi (5,992.38 km) |
| Pontypridd to De Witt (New York) | 3,314.46 mi (5,334.11 km) |
| Pontypridd to Dearborn (Michigan) | 3,629.43 mi (5,841.00 km) |
| Pontypridd to Dearborn Heights (Michigan) | 3,631.78 mi (5,844.78 km) |
| Pontypridd to DeBary (Florida) | 4,183.08 mi (6,732.02 km) |
| Pontypridd to Decatur (Alabama) | 4,139.64 mi (6,662.10 km) |
