| Merthyr Tudful to Wells Branch (Texas) | 4,769.69 mi (7,676.08 km) |
| Merthyr Tudful to Wenatchee (Washington) | 4,638.76 mi (7,465.36 km) |
| Merthyr Tudful to Wentzville (Missouri) | 4,084.36 mi (6,573.14 km) |
| Merthyr Tudful to Weslaco (Texas) | 5,005.84 mi (8,056.13 km) |
| Merthyr Tudful to Wesley Chapel (Florida) | 4,255.29 mi (6,848.23 km) |
| Merthyr Tudful to West Allis (Wisconsin) | 3,779.65 mi (6,082.75 km) |
| Merthyr Tudful to West Babylon (New York) | 3,296.56 mi (5,305.30 km) |
| Merthyr Tudful to West Bend (Wisconsin) | 3,766.89 mi (6,062.22 km) |
| Merthyr Tudful to West Carrollton (Ohio) | 3,784.30 mi (6,090.25 km) |
| Merthyr Tudful to West Carson (California) | 5,338.73 mi (8,591.86 km) |
| Merthyr Tudful to West Chester (Pennsylvania) | 3,421.47 mi (5,506.32 km) |
| Merthyr Tudful to West Chicago (Illinois) | 3,837.77 mi (6,176.29 km) |
| Merthyr Tudful to West Columbia (South Carolina) | 3,921.24 mi (6,310.63 km) |
| Merthyr Tudful to West Covina (California) | 5,312.98 mi (8,550.41 km) |
| Merthyr Tudful to West Des Moines (Iowa) | 4,064.68 mi (6,541.48 km) |
