| Swansea to Dendermonde | 4,372.76 mi (7,037.28 km) |
| Swansea to Dessel | 4,404.36 mi (7,088.14 km) |
| Swansea to Destelbergen | 4,360.81 mi (7,018.05 km) |
| Swansea to Deurne | 4,380.02 mi (7,048.97 km) |
| Swansea to Diepenbeek | 4,426.91 mi (7,124.43 km) |
| Swansea to Diest | 4,410.43 mi (7,097.90 km) |
| Swansea to Diksmuide | 4,325.79 mi (6,961.69 km) |
| Swansea to Dilbeek | 4,385.22 mi (7,057.32 km) |
| Swansea to Dinant | 4,430.02 mi (7,129.44 km) |
| Swansea to Dison | 4,453.35 mi (7,166.97 km) |
| Swansea to Dour | 4,381.99 mi (7,052.13 km) |
| Swansea to Drongen | 4,355.74 mi (7,009.89 km) |
| Swansea to Duffel | 4,386.29 mi (7,059.06 km) |
| Swansea to Durbuy | 4,447.65 mi (7,157.80 km) |
| Swansea to Ecaussinnes-Lalaing | 4,391.71 mi (7,067.77 km) |
