| Penarth to Caguas (Puerto Rico) | 4,078.26 mi (6,563.32 km) |
| Penarth to Cahokia (Illinois) | 4,086.65 mi (6,576.83 km) |
| Penarth to Calabasas (California) | 5,354.06 mi (8,616.53 km) |
| Penarth to Caldwell (Idaho) | 4,761.36 mi (7,662.66 km) |
| Penarth to Caledonia (Wisconsin) | 3,800.92 mi (6,117.00 km) |
| Penarth to Calera (Alabama) | 4,210.71 mi (6,776.49 km) |
| Penarth to Calexico (California) | 5,328.57 mi (8,575.50 km) |
| Penarth to Calhoun (Georgia) | 4,070.61 mi (6,551.01 km) |
| Penarth to California (Maryland) | 3,546.01 mi (5,706.75 km) |
| Penarth to California City (California) | 5,270.37 mi (8,481.83 km) |
| Penarth to Callaway (Florida) | 4,308.49 mi (6,933.84 km) |
| Penarth to Calumet City (Illinois) | 3,842.05 mi (6,183.19 km) |
| Penarth to Calverton (Maryland) | 3,531.06 mi (5,682.70 km) |
| Penarth to Camano (Washington) | 4,678.30 mi (7,528.99 km) |
| Penarth to Camarillo (California) | 5,361.18 mi (8,627.98 km) |
