| Llantrisant to Clarkston (Georgia) | 4,063.80 mi (6,540.06 km) |
| Llantrisant to Clarksville (Indiana) | 3,912.20 mi (6,296.08 km) |
| Llantrisant to Clarksville (Tennessee) | 4,057.95 mi (6,530.65 km) |
| Llantrisant to Clawson (Michigan) | 3,617.48 mi (5,821.77 km) |
| Llantrisant to Clay (Alabama) | 4,166.65 mi (6,705.58 km) |
| Llantrisant to Clayton (California) | 5,230.35 mi (8,417.43 km) |
| Llantrisant to Clayton (Missouri) | 4,077.54 mi (6,562.17 km) |
| Llantrisant to Clayton (North Carolina) | 3,736.61 mi (6,013.49 km) |
| Llantrisant to Clayton (Ohio) | 3,783.46 mi (6,088.89 km) |
| Llantrisant to Clearfield (Utah) | 4,739.53 mi (7,627.54 km) |
| Llantrisant to Clearlake (California) | 5,193.56 mi (8,358.23 km) |
| Llantrisant to Clearwater (Florida) | 4,288.02 mi (6,900.90 km) |
| Llantrisant to Cleburne (Texas) | 4,666.41 mi (7,509.86 km) |
| Llantrisant to Clemmons (North Carolina) | 3,799.67 mi (6,114.98 km) |
| Llantrisant to Clemson (South Carolina) | 3,963.24 mi (6,378.22 km) |
