| Merthyr Tudful to West St. Paul (Minnesota) | 3,881.91 mi (6,247.33 km) |
| Merthyr Tudful to West University Place (Texas) | 4,718.14 mi (7,593.11 km) |
| Merthyr Tudful to West Valley City (Utah) | 4,752.38 mi (7,648.22 km) |
| Merthyr Tudful to West Whittier-Los Nietos (California) | 5,322.68 mi (8,566.03 km) |
| Merthyr Tudful to Westbrook (Maine) | 3,050.22 mi (4,908.85 km) |
| Merthyr Tudful to Westbury (New York) | 3,304.04 mi (5,317.34 km) |
| Merthyr Tudful to Westchase (Florida) | 4,274.92 mi (6,879.81 km) |
| Merthyr Tudful to Westchester (Florida) | 4,295.70 mi (6,913.27 km) |
| Merthyr Tudful to Westchester (Illinois) | 3,827.03 mi (6,159.01 km) |
| Merthyr Tudful to Western Springs (Illinois) | 3,829.56 mi (6,163.08 km) |
| Merthyr Tudful to Westerville (Ohio) | 3,710.49 mi (5,971.45 km) |
| Merthyr Tudful to Westfield (Indiana) | 3,842.74 mi (6,184.29 km) |
| Merthyr Tudful to Westfield (Massachusetts) | 3,211.79 mi (5,168.88 km) |
| Merthyr Tudful to Westfield (New Jersey) | 3,339.68 mi (5,374.70 km) |
| Merthyr Tudful to Westlake (Ohio) | 3,611.49 mi (5,812.14 km) |
