| Merthyr Tudful to Dormagen | 441.12 mi (709.91 km) |
| Merthyr Tudful to Dornstadt | 630.98 mi (1,015.47 km) |
| Merthyr Tudful to Dorsten | 442.53 mi (712.19 km) |
| Merthyr Tudful to Dortmund | 464.95 mi (748.27 km) |
| Merthyr Tudful to Dorverden | 537.64 mi (865.25 km) |
| Merthyr Tudful to Dossenheim | 551.02 mi (886.78 km) |
| Merthyr Tudful to Dreieich | 539.54 mi (868.30 km) |
| Merthyr Tudful to Drensteinfurt | 474.90 mi (764.27 km) |
| Merthyr Tudful to Dresden | 737.79 mi (1,187.36 km) |
| Merthyr Tudful to Drochtersen | 550.07 mi (885.25 km) |
| Merthyr Tudful to Drolshagen | 482.54 mi (776.58 km) |
| Merthyr Tudful to Duderstadt | 584.30 mi (940.34 km) |
| Merthyr Tudful to Duisburg | 435.48 mi (700.83 km) |
| Merthyr Tudful to Dulmen | 455.09 mi (732.39 km) |
| Merthyr Tudful to Duren | 430.88 mi (693.43 km) |
