| Swansea to Droylsden | 4,060.50 mi (6,534.75 km) |
| Swansea to Dudley | 4,090.77 mi (6,583.46 km) |
| Swansea to Dukinfield | 4,063.59 mi (6,539.71 km) |
| Swansea to Dumbarton | 3,906.65 mi (6,287.15 km) |
| Swansea to Dumfries | 3,963.99 mi (6,379.43 km) |
| Swansea to Dunbar | 3,979.01 mi (6,403.60 km) |
| Swansea to Dunblane | 3,922.44 mi (6,312.56 km) |
| Swansea to Dundee | 3,950.98 mi (6,358.48 km) |
| Swansea to Dunfermline | 3,944.20 mi (6,347.57 km) |
| Swansea to Dunstable | 4,169.15 mi (6,709.60 km) |
| Swansea to Durham | 4,046.14 mi (6,511.64 km) |
| Swansea to Ealing | 4,188.87 mi (6,741.34 km) |
| Swansea to Earlestown | 4,042.91 mi (6,506.43 km) |
| Swansea to Earley | 4,166.90 mi (6,705.98 km) |
| Swansea to East Barnet | 4,190.28 mi (6,743.60 km) |
