| Swansea to Darby (Pennsylvania) | 792.76 mi (1,275.83 km) |
| Swansea to Dardenne Prairie (Missouri) | 42.69 mi (68.71 km) |
| Swansea to Darien (Illinois) | 244.73 mi (393.85 km) |
| Swansea to Davenport (Iowa) | 210.25 mi (338.36 km) |
| Swansea to Davidson (North Carolina) | 547.69 mi (881.42 km) |
| Swansea to Davie (Florida) | 1,029.70 mi (1,657.14 km) |
| Swansea to Davis (California) | 1,706.94 mi (2,747.06 km) |
| Swansea to Dayton (Nevada) | 1,584.08 mi (2,549.32 km) |
| Swansea to Dayton (Ohio) | 321.30 mi (517.08 km) |
| Swansea to Daytona Beach (Florida) | 822.11 mi (1,323.06 km) |
| Swansea to De Pere (Wisconsin) | 418.06 mi (672.80 km) |
| Swansea to De Witt (New York) | 789.18 mi (1,270.06 km) |
| Swansea to Dearborn (Michigan) | 440.72 mi (709.27 km) |
| Swansea to Dearborn Heights (Michigan) | 438.16 mi (705.14 km) |
| Swansea to DeBary (Florida) | 832.24 mi (1,339.36 km) |
