| Swansea to Dewsbury | 4,074.31 mi (6,556.97 km) |
| Swansea to Deysbrook | 4,032.77 mi (6,490.12 km) |
| Swansea to Didcot | 4,149.79 mi (6,678.44 km) |
| Swansea to Dingle | 4,033.16 mi (6,490.75 km) |
| Swansea to Dinnington | 4,099.76 mi (6,597.93 km) |
| Swansea to Dodworth | 4,082.72 mi (6,570.50 km) |
| Swansea to Dollis Hill | 4,189.95 mi (6,743.07 km) |
| Swansea to Doncaster | 4,097.73 mi (6,594.66 km) |
| Swansea to Dorchester | 4,129.38 mi (6,645.59 km) |
| Swansea to Dorking | 4,196.35 mi (6,753.37 km) |
| Swansea to Dorridge | 4,107.46 mi (6,610.32 km) |
| Swansea to Dover | 4,262.92 mi (6,860.51 km) |
| Swansea to Downham Market | 4,182.21 mi (6,730.62 km) |
| Swansea to Droitwich | 4,095.24 mi (6,590.66 km) |
| Swansea to Dronfield | 4,091.61 mi (6,584.81 km) |
