| Penarth to Jacksonville (Texas) | 4,612.62 mi (7,423.29 km) |
| Penarth to Jacksonville Beach (Florida) | 4,127.32 mi (6,642.27 km) |
| Penarth to James Island (South Carolina) | 3,946.89 mi (6,351.91 km) |
| Penarth to Jamestown (New York) | 3,491.97 mi (5,619.77 km) |
| Penarth to Jamestown (North Dakota) | 4,007.35 mi (6,449.20 km) |
| Penarth to Janesville (Wisconsin) | 3,849.63 mi (6,195.38 km) |
| Penarth to Jasmine Estates (Florida) | 4,279.48 mi (6,887.17 km) |
| Penarth to Jasper (Alabama) | 4,196.93 mi (6,754.30 km) |
| Penarth to Jasper (Indiana) | 3,966.77 mi (6,383.90 km) |
| Penarth to Jefferson (Georgia) | 4,032.52 mi (6,489.71 km) |
| Penarth to Jefferson (Louisiana) | 4,507.43 mi (7,254.01 km) |
| Penarth to Jefferson City (Missouri) | 4,164.36 mi (6,701.89 km) |
| Penarth to Jefferson Hills (Pennsylvania) | 3,598.65 mi (5,791.47 km) |
| Penarth to Jefferson Valley-Yorktown (New York) | 3,303.81 mi (5,316.97 km) |
| Penarth to Jeffersontown (Kentucky) | 3,920.78 mi (6,309.89 km) |
