| Merthyr Tudful to Cutrofiano | 1,303.26 mi (2,097.40 km) |
| Merthyr Tudful to Dalmine | 724.62 mi (1,166.16 km) |
| Merthyr Tudful to Deruta | 951.85 mi (1,531.85 km) |
| Merthyr Tudful to Desenzano del Garda | 767.38 mi (1,234.99 km) |
| Merthyr Tudful to Desio | 712.05 mi (1,145.93 km) |
| Merthyr Tudful to Dolianova | 1,044.90 mi (1,681.61 km) |
| Merthyr Tudful to Dolo | 827.74 mi (1,332.12 km) |
| Merthyr Tudful to Domodossola | 655.79 mi (1,055.40 km) |
| Merthyr Tudful to Dorgali | 1,002.75 mi (1,613.77 km) |
| Merthyr Tudful to Dueville | 798.88 mi (1,285.67 km) |
| Merthyr Tudful to Eboli | 1,163.95 mi (1,873.20 km) |
| Merthyr Tudful to Elmas | 1,048.17 mi (1,686.86 km) |
| Merthyr Tudful to Empoli | 863.89 mi (1,390.30 km) |
| Merthyr Tudful to Enna | 1,301.81 mi (2,095.05 km) |
| Merthyr Tudful to Eraclea | 844.90 mi (1,359.73 km) |
