| Swansea to Dover (New Hampshire) | 1,045.46 mi (1,682.50 km) |
| Swansea to Dover (New Jersey) | 834.40 mi (1,342.83 km) |
| Swansea to Dover (Ohio) | 473.15 mi (761.46 km) |
| Swansea to Downers Grove (Illinois) | 247.06 mi (397.60 km) |
| Swansea to Downey (California) | 1,593.85 mi (2,565.06 km) |
| Swansea to Dranesville (Virginia) | 679.77 mi (1,093.98 km) |
| Swansea to Draper (Utah) | 1,170.52 mi (1,883.77 km) |
| Swansea to Drexel Heights (Arizona) | 1,263.23 mi (2,032.98 km) |
| Swansea to Drexel Hill (Pennsylvania) | 790.57 mi (1,272.30 km) |
| Swansea to Duarte (California) | 1,578.96 mi (2,541.10 km) |
| Swansea to Dublin (California) | 1,726.46 mi (2,778.47 km) |
| Swansea to Dublin (Georgia) | 574.20 mi (924.09 km) |
| Swansea to Dublin (Ohio) | 381.03 mi (613.20 km) |
| Swansea to Dubuque (Iowa) | 275.50 mi (443.37 km) |
| Swansea to Duluth (Georgia) | 451.82 mi (727.14 km) |
