| Pontypridd to Clarkston (Georgia) | 4,063.99 mi (6,540.35 km) |
| Pontypridd to Clarksville (Indiana) | 3,912.01 mi (6,295.77 km) |
| Pontypridd to Clarksville (Tennessee) | 4,057.80 mi (6,530.40 km) |
| Pontypridd to Clawson (Michigan) | 3,617.11 mi (5,821.18 km) |
| Pontypridd to Clay (Alabama) | 4,166.72 mi (6,705.69 km) |
| Pontypridd to Clayton (California) | 5,228.46 mi (8,414.40 km) |
| Pontypridd to Clayton (Missouri) | 4,077.11 mi (6,561.48 km) |
| Pontypridd to Clayton (North Carolina) | 3,736.97 mi (6,014.07 km) |
| Pontypridd to Clayton (Ohio) | 3,783.23 mi (6,088.53 km) |
| Pontypridd to Clearfield (Utah) | 4,737.96 mi (7,625.01 km) |
| Pontypridd to Clearlake (California) | 5,191.60 mi (8,355.08 km) |
| Pontypridd to Clearwater (Florida) | 4,288.64 mi (6,901.89 km) |
| Pontypridd to Cleburne (Texas) | 4,666.00 mi (7,509.20 km) |
| Pontypridd to Clemmons (North Carolina) | 3,799.90 mi (6,115.35 km) |
| Pontypridd to Clemson (South Carolina) | 3,963.44 mi (6,378.54 km) |
