| Penarth to Iselin (New Jersey) | 3,356.79 mi (5,402.23 km) |
| Penarth to Isla Vista (California) | 5,377.50 mi (8,654.25 km) |
| Penarth to Issaquah (Washington) | 4,702.66 mi (7,568.19 km) |
| Penarth to Ithaca (New York) | 3,366.96 mi (5,418.60 km) |
| Penarth to Ives Estates (Florida) | 4,289.22 mi (6,902.83 km) |
| Penarth to Jackson (Michigan) | 3,690.89 mi (5,939.91 km) |
| Penarth to Jackson (Mississippi) | 4,392.06 mi (7,068.34 km) |
| Penarth to Jackson (Missouri) | 4,122.48 mi (6,634.49 km) |
| Penarth to Jackson (Tennessee) | 4,172.89 mi (6,715.62 km) |
| Penarth to Jackson (Wyoming) | 4,584.70 mi (7,378.36 km) |
| Penarth to Jacksonville (Alabama) | 4,136.92 mi (6,657.72 km) |
| Penarth to Jacksonville (Arkansas) | 4,342.19 mi (6,988.08 km) |
| Penarth to Jacksonville (Florida) | 4,136.07 mi (6,656.37 km) |
| Penarth to Jacksonville (Illinois) | 4,033.57 mi (6,491.40 km) |
| Penarth to Jacksonville (North Carolina) | 3,746.00 mi (6,028.60 km) |
