| Caerphilly to Dendermonde | 318.20 mi (512.09 km) |
| Caerphilly to Dessel | 359.82 mi (579.08 km) |
| Caerphilly to Destelbergen | 305.15 mi (491.10 km) |
| Caerphilly to Deurne | 331.81 mi (534.00 km) |
| Caerphilly to Diepenbeek | 376.16 mi (605.37 km) |
| Caerphilly to Diest | 359.53 mi (578.61 km) |
| Caerphilly to Diksmuide | 265.43 mi (427.17 km) |
| Caerphilly to Dilbeek | 327.20 mi (526.58 km) |
| Caerphilly to Dinant | 365.49 mi (588.20 km) |
| Caerphilly to Dison | 398.76 mi (641.74 km) |
| Caerphilly to Dour | 314.99 mi (506.92 km) |
| Caerphilly to Drongen | 299.44 mi (481.91 km) |
| Caerphilly to Duffel | 335.33 mi (539.65 km) |
| Caerphilly to Durbuy | 386.59 mi (622.16 km) |
| Caerphilly to Ecaussinnes-Lalaing | 328.67 mi (528.95 km) |
