| Merthyr Tudful to Dillenburg | 508.69 mi (818.65 km) |
| Merthyr Tudful to Dillingen | 649.78 mi (1,045.72 km) |
| Merthyr Tudful to Dillingen | 473.24 mi (761.61 km) |
| Merthyr Tudful to Dingolfing | 732.83 mi (1,179.38 km) |
| Merthyr Tudful to Dinkelsbuhl | 629.70 mi (1,013.40 km) |
| Merthyr Tudful to Dinklage | 491.05 mi (790.26 km) |
| Merthyr Tudful to Dinslaken | 433.25 mi (697.25 km) |
| Merthyr Tudful to Dippoldiswalde | 736.69 mi (1,185.58 km) |
| Merthyr Tudful to Ditzingen | 584.31 mi (940.36 km) |
| Merthyr Tudful to Dobeln | 710.15 mi (1,142.88 km) |
| Merthyr Tudful to Doberlug-Kirchhain | 724.36 mi (1,165.74 km) |
| Merthyr Tudful to Donaueschingen | 589.62 mi (948.90 km) |
| Merthyr Tudful to Donauworth | 659.83 mi (1,061.89 km) |
| Merthyr Tudful to Donzdorf | 619.46 mi (996.93 km) |
| Merthyr Tudful to Dorfen | 728.50 mi (1,172.41 km) |
