| Penarth to Willow Grove (Pennsylvania) | 3,407.95 mi (5,484.57 km) |
| Penarth to Willowbrook (California) | 5,351.95 mi (8,613.13 km) |
| Penarth to Willowick (Ohio) | 3,601.44 mi (5,795.96 km) |
| Penarth to Wilmette (Illinois) | 3,827.86 mi (6,160.34 km) |
| Penarth to Wilmington (Delaware) | 3,443.01 mi (5,540.99 km) |
| Penarth to Wilmington (North Carolina) | 3,790.91 mi (6,100.88 km) |
| Penarth to Wilmington (Ohio) | 3,793.62 mi (6,105.24 km) |
| Penarth to Wilmington Island (Georgia) | 4,025.51 mi (6,478.43 km) |
| Penarth to Wilson (North Carolina) | 3,721.97 mi (5,989.94 km) |
| Penarth to Wilsonville (Oregon) | 4,848.13 mi (7,802.31 km) |
| Penarth to Wilton Manors (Florida) | 4,277.53 mi (6,884.02 km) |
| Penarth to Wimauma (Florida) | 4,292.78 mi (6,908.57 km) |
| Penarth to Winchester (Kentucky) | 3,874.68 mi (6,235.69 km) |
| Penarth to Winchester (Nevada) | 5,124.96 mi (8,247.82 km) |
| Penarth to Winchester (Virginia) | 3,576.41 mi (5,755.67 km) |
