| Merthyr Tudful to Wheaton (Maryland) | 3,521.20 mi (5,666.83 km) |
| Merthyr Tudful to Wheeling (Illinois) | 3,815.44 mi (6,140.35 km) |
| Merthyr Tudful to Wheeling (West Virginia) | 3,623.42 mi (5,831.33 km) |
| Merthyr Tudful to White Bear Lake (Minnesota) | 3,871.79 mi (6,231.04 km) |
| Merthyr Tudful to White Center (Washington) | 4,690.51 mi (7,548.65 km) |
| Merthyr Tudful to White House (Tennessee) | 4,030.85 mi (6,487.03 km) |
| Merthyr Tudful to White Oak (Maryland) | 3,518.56 mi (5,662.58 km) |
| Merthyr Tudful to White Oak (Ohio) | 3,819.44 mi (6,146.80 km) |
| Merthyr Tudful to White Plains (New York) | 3,299.68 mi (5,310.32 km) |
| Merthyr Tudful to White Settlement (Texas) | 4,641.91 mi (7,470.43 km) |
| Merthyr Tudful to Whitefish Bay (Wisconsin) | 3,769.91 mi (6,067.08 km) |
| Merthyr Tudful to Whitehall (Ohio) | 3,716.04 mi (5,980.39 km) |
| Merthyr Tudful to Whitewater (Wisconsin) | 3,814.21 mi (6,138.38 km) |
| Merthyr Tudful to Whitney (Nevada) | 5,103.12 mi (8,212.67 km) |
| Merthyr Tudful to Whittier (California) | 5,321.48 mi (8,564.10 km) |
