| Mountain Ash to Dewsbury | 156.92 mi (252.54 km) |
| Mountain Ash to Deysbrook | 122.19 mi (196.64 km) |
| Mountain Ash to Didcot | 91.82 mi (147.77 km) |
| Mountain Ash to Dingle | 118.49 mi (190.69 km) |
| Mountain Ash to Dinnington | 148.15 mi (238.42 km) |
| Mountain Ash to Dodworth | 150.31 mi (241.90 km) |
| Mountain Ash to Dollis Hill | 135.14 mi (217.49 km) |
| Mountain Ash to Doncaster | 158.32 mi (254.79 km) |
| Mountain Ash to Dorchester | 78.23 mi (125.90 km) |
| Mountain Ash to Dorking | 134.85 mi (217.02 km) |
| Mountain Ash to Dorridge | 83.91 mi (135.05 km) |
| Mountain Ash to Dover | 205.59 mi (330.86 km) |
| Mountain Ash to Downham Market | 171.94 mi (276.72 km) |
| Mountain Ash to Droitwich | 66.04 mi (106.27 km) |
| Mountain Ash to Dronfield | 137.90 mi (221.93 km) |
