| Penarth to Clarkston (Georgia) | 4,074.47 mi (6,557.22 km) |
| Penarth to Clarksville (Indiana) | 3,923.24 mi (6,313.84 km) |
| Penarth to Clarksville (Tennessee) | 4,068.96 mi (6,548.36 km) |
| Penarth to Clawson (Michigan) | 3,628.67 mi (5,839.78 km) |
| Penarth to Clay (Alabama) | 4,177.44 mi (6,722.94 km) |
| Penarth to Clayton (California) | 5,242.06 mi (8,436.29 km) |
| Penarth to Clayton (Missouri) | 4,088.79 mi (6,580.27 km) |
| Penarth to Clayton (North Carolina) | 3,747.07 mi (6,030.32 km) |
| Penarth to Clayton (Ohio) | 3,794.54 mi (6,106.72 km) |
| Penarth to Clearfield (Utah) | 4,751.27 mi (7,646.42 km) |
| Penarth to Clearlake (California) | 5,205.26 mi (8,377.06 km) |
| Penarth to Clearwater (Florida) | 4,298.13 mi (6,917.18 km) |
| Penarth to Cleburne (Texas) | 4,677.64 mi (7,527.93 km) |
| Penarth to Clemmons (North Carolina) | 3,810.28 mi (6,132.05 km) |
| Penarth to Clemson (South Carolina) | 3,973.88 mi (6,395.35 km) |
