| Caerfyrddin to Dendermonde | 366.64 mi (590.05 km) |
| Caerfyrddin to Dessel | 407.30 mi (655.49 km) |
| Caerfyrddin to Destelbergen | 353.66 mi (569.16 km) |
| Caerfyrddin to Deurne | 379.52 mi (610.78 km) |
| Caerfyrddin to Diepenbeek | 424.50 mi (683.16 km) |
| Caerfyrddin to Diest | 407.78 mi (656.26 km) |
| Caerfyrddin to Diksmuide | 314.36 mi (505.91 km) |
| Caerfyrddin to Dilbeek | 376.15 mi (605.36 km) |
| Caerfyrddin to Dinant | 415.37 mi (668.47 km) |
| Caerfyrddin to Dison | 447.65 mi (720.42 km) |
| Caerfyrddin to Dour | 365.04 mi (587.48 km) |
| Caerfyrddin to Drongen | 348.00 mi (560.05 km) |
| Caerfyrddin to Duffel | 383.42 mi (617.06 km) |
| Caerfyrddin to Durbuy | 436.14 mi (701.90 km) |
| Caerfyrddin to Ecaussinnes-Lalaing | 378.27 mi (608.77 km) |
