| Penarth to Hilliard (Ohio) | 3,740.14 mi (6,019.18 km) |
| Penarth to Hillsboro (Oregon) | 4,840.54 mi (7,790.10 km) |
| Penarth to Hillsborough (California) | 5,277.12 mi (8,492.70 km) |
| Penarth to Hillsborough (New Jersey) | 3,373.30 mi (5,428.80 km) |
| Penarth to Hilo (Hawaii) | 7,237.11 mi (11,647.00 km) |
| Penarth to Hilton Head Island (South Carolina) | 4,007.08 mi (6,448.77 km) |
| Penarth to Hinesville (Georgia) | 4,060.91 mi (6,535.41 km) |
| Penarth to Hinsdale (Illinois) | 3,848.13 mi (6,192.97 km) |
| Penarth to Hobart (Indiana) | 3,835.78 mi (6,173.10 km) |
| Penarth to Hobbs (New Mexico) | 4,879.83 mi (7,853.33 km) |
| Penarth to Hobe Sound (Florida) | 4,232.01 mi (6,810.76 km) |
| Penarth to Hoboken (New Jersey) | 3,337.38 mi (5,371.00 km) |
| Penarth to Hockessin (Delaware) | 3,446.96 mi (5,547.34 km) |
| Penarth to Hoffman Estates (Illinois) | 3,844.62 mi (6,187.32 km) |
| Penarth to Holbrook (New York) | 3,295.68 mi (5,303.88 km) |
