| Caernarfon to Dendermonde | 383.72 mi (617.53 km) |
| Caernarfon to Dessel | 418.51 mi (673.53 km) |
| Caernarfon to Destelbergen | 371.48 mi (597.84 km) |
| Caernarfon to Deurne | 392.60 mi (631.82 km) |
| Caernarfon to Diepenbeek | 439.38 mi (707.12 km) |
| Caernarfon to Diest | 422.65 mi (680.20 km) |
| Caernarfon to Diksmuide | 335.94 mi (540.65 km) |
| Caernarfon to Dilbeek | 395.70 mi (636.81 km) |
| Caernarfon to Dinant | 440.18 mi (708.40 km) |
| Caernarfon to Dison | 465.02 mi (748.38 km) |
| Caernarfon to Dour | 392.60 mi (631.83 km) |
| Caernarfon to Drongen | 366.28 mi (589.48 km) |
| Caernarfon to Duffel | 398.20 mi (640.84 km) |
| Caernarfon to Durbuy | 458.01 mi (737.09 km) |
| Caernarfon to Ecaussinnes-Lalaing | 401.86 mi (646.73 km) |
