| Merthyr Tudful to Wayne (Michigan) | 3,632.56 mi (5,846.04 km) |
| Merthyr Tudful to Waynesboro (Pennsylvania) | 3,511.51 mi (5,651.22 km) |
| Merthyr Tudful to Waynesboro (Virginia) | 3,641.00 mi (5,859.62 km) |
| Merthyr Tudful to Weatherford (Oklahoma) | 4,546.83 mi (7,317.41 km) |
| Merthyr Tudful to Weatherford (Texas) | 4,654.13 mi (7,490.10 km) |
| Merthyr Tudful to Webb City (Missouri) | 4,305.02 mi (6,928.26 km) |
| Merthyr Tudful to Webster (Texas) | 4,715.08 mi (7,588.19 km) |
| Merthyr Tudful to Webster Groves (Missouri) | 4,075.38 mi (6,558.69 km) |
| Merthyr Tudful to Weddington (North Carolina) | 3,857.68 mi (6,208.33 km) |
| Merthyr Tudful to Weigelstown (Pennsylvania) | 3,470.55 mi (5,585.30 km) |
| Merthyr Tudful to Weirton (West Virginia) | 3,603.50 mi (5,799.27 km) |
| Merthyr Tudful to Wekiwa Springs (Florida) | 4,193.17 mi (6,748.25 km) |
| Merthyr Tudful to Welby (Colorado) | 4,556.56 mi (7,333.07 km) |
| Merthyr Tudful to Wellington (Colorado) | 4,513.64 mi (7,264.00 km) |
| Merthyr Tudful to Wellington (Florida) | 4,246.91 mi (6,834.74 km) |
