| Merthyr Tudful to Wallington | 141.52 mi (227.75 km) |
| Merthyr Tudful to Wallsend | 236.92 mi (381.29 km) |
| Merthyr Tudful to Walsall | 82.79 mi (133.24 km) |
| Merthyr Tudful to Walsall Wood | 86.59 mi (139.35 km) |
| Merthyr Tudful to Waltham Abbey | 144.67 mi (232.83 km) |
| Merthyr Tudful to Waltham Cross | 143.23 mi (230.51 km) |
| Merthyr Tudful to Walthamstow | 144.28 mi (232.19 km) |
| Merthyr Tudful to Walton upon Thames | 129.68 mi (208.70 km) |
| Merthyr Tudful to Walton-on-the-Naze | 198.63 mi (319.67 km) |
| Merthyr Tudful to Wandsworth | 138.17 mi (222.36 km) |
| Merthyr Tudful to Wanstead | 146.44 mi (235.67 km) |
| Merthyr Tudful to Wantage | 84.28 mi (135.64 km) |
| Merthyr Tudful to Ware | 143.13 mi (230.35 km) |
| Merthyr Tudful to Warfield | 115.25 mi (185.47 km) |
| Merthyr Tudful to Warminster | 63.52 mi (102.23 km) |
