| Penarth to Carson (California) | 5,357.33 mi (8,621.79 km) |
| Penarth to Carson City (Nevada) | 5,106.00 mi (8,217.31 km) |
| Penarth to Carteret (New Jersey) | 3,352.47 mi (5,395.28 km) |
| Penarth to Cartersville (Georgia) | 4,080.62 mi (6,567.12 km) |
| Penarth to Carthage (Missouri) | 4,316.46 mi (6,946.67 km) |
| Penarth to Cary (Illinois) | 3,841.80 mi (6,182.79 km) |
| Penarth to Cary (North Carolina) | 3,756.80 mi (6,045.98 km) |
| Penarth to Casa de Oro-Mount Helix (California) | 5,374.51 mi (8,649.44 km) |
| Penarth to Casa Grande (Arizona) | 5,185.89 mi (8,345.88 km) |
| Penarth to Casas Adobes (Arizona) | 5,189.93 mi (8,352.38 km) |
| Penarth to Cascades (Virginia) | 3,549.65 mi (5,712.62 km) |
| Penarth to Casper (Wyoming) | 4,469.14 mi (7,192.38 km) |
| Penarth to Casselberry (Florida) | 4,203.25 mi (6,764.47 km) |
| Penarth to Castaic (California) | 5,333.40 mi (8,583.28 km) |
| Penarth to Castle Pines (Colorado) | 4,592.30 mi (7,390.60 km) |
