| Penarth to Wichita (Kansas) | 4,405.56 mi (7,090.06 km) |
| Penarth to Wichita Falls (Texas) | 4,641.74 mi (7,470.16 km) |
| Penarth to Wickliffe (Ohio) | 3,602.67 mi (5,797.94 km) |
| Penarth to Wildomar (California) | 5,336.40 mi (8,588.11 km) |
| Penarth to Wildwood (Florida) | 4,226.69 mi (6,802.21 km) |
| Penarth to Wildwood (Missouri) | 4,105.13 mi (6,606.57 km) |
| Penarth to Wilkes-Barre (Pennsylvania) | 3,392.01 mi (5,458.92 km) |
| Penarth to Wilkinsburg (Pennsylvania) | 3,589.55 mi (5,776.82 km) |
| Penarth to Williamsburg (Virginia) | 3,600.89 mi (5,795.07 km) |
| Penarth to Williamsport (Pennsylvania) | 3,439.72 mi (5,535.70 km) |
| Penarth to Williamstown (New Jersey) | 3,422.08 mi (5,507.30 km) |
| Penarth to Willimantic (Connecticut) | 3,221.60 mi (5,184.67 km) |
| Penarth to Williston (North Dakota) | 4,112.79 mi (6,618.89 km) |
| Penarth to Willmar (Minnesota) | 3,962.36 mi (6,376.80 km) |
| Penarth to Willoughby (Ohio) | 3,598.55 mi (5,791.31 km) |
