| Merthyr Tudful to Deville-les-Rouen | 249.66 mi (401.78 km) |
| Merthyr Tudful to Dieppe | 231.70 mi (372.88 km) |
| Merthyr Tudful to Digne-les-Bains | 689.90 mi (1,110.28 km) |
| Merthyr Tudful to Dijon | 484.51 mi (779.74 km) |
| Merthyr Tudful to Dinan | 234.63 mi (377.59 km) |
| Merthyr Tudful to Dinard | 222.65 mi (358.33 km) |
| Merthyr Tudful to Divonne-les-Bains | 568.73 mi (915.28 km) |
| Merthyr Tudful to Dole | 511.36 mi (822.96 km) |
| Merthyr Tudful to Dombasle-sur-Meurthe | 480.76 mi (773.70 km) |
| Merthyr Tudful to Domerat | 457.92 mi (736.96 km) |
| Merthyr Tudful to Domont | 313.48 mi (504.50 km) |
| Merthyr Tudful to Douai | 295.92 mi (476.23 km) |
| Merthyr Tudful to Douarnenez | 255.77 mi (411.63 km) |
| Merthyr Tudful to Douchy-les-Mines | 310.55 mi (499.78 km) |
| Merthyr Tudful to Dourdan | 325.83 mi (524.38 km) |
