| Merthyr Tudful to Winder (Georgia) | 4,029.78 mi (6,485.30 km) |
| Merthyr Tudful to Windsor (California) | 5,212.76 mi (8,389.13 km) |
| Merthyr Tudful to Windsor (Colorado) | 4,522.53 mi (7,278.31 km) |
| Merthyr Tudful to Winfield (Kansas) | 4,393.31 mi (7,070.36 km) |
| Merthyr Tudful to Winnetka (Illinois) | 3,809.55 mi (6,130.88 km) |
| Merthyr Tudful to Winona (Minnesota) | 3,868.96 mi (6,226.49 km) |
| Merthyr Tudful to Winston-Salem (North Carolina) | 3,787.31 mi (6,095.08 km) |
| Merthyr Tudful to Winter Garden (Florida) | 4,208.16 mi (6,772.39 km) |
| Merthyr Tudful to Winter Gardens (California) | 5,348.61 mi (8,607.75 km) |
| Merthyr Tudful to Winter Haven (Florida) | 4,239.01 mi (6,822.03 km) |
| Merthyr Tudful to Winter Park (Florida) | 4,194.71 mi (6,750.73 km) |
| Merthyr Tudful to Winter Springs (Florida) | 4,187.12 mi (6,738.52 km) |
| Merthyr Tudful to Winterville (North Carolina) | 3,695.49 mi (5,947.31 km) |
| Merthyr Tudful to Winton (California) | 5,211.59 mi (8,387.25 km) |
| Merthyr Tudful to Wisconsin Rapids (Wisconsin) | 3,784.82 mi (6,091.08 km) |
