| Llantrisant to Carson (California) | 5,345.60 mi (8,602.92 km) |
| Llantrisant to Carson City (Nevada) | 5,094.27 mi (8,198.44 km) |
| Llantrisant to Carteret (New Jersey) | 3,341.83 mi (5,378.15 km) |
| Llantrisant to Cartersville (Georgia) | 4,069.90 mi (6,549.87 km) |
| Llantrisant to Carthage (Missouri) | 4,305.14 mi (6,928.46 km) |
| Llantrisant to Cary (Illinois) | 3,830.46 mi (6,164.53 km) |
| Llantrisant to Cary (North Carolina) | 3,746.31 mi (6,029.10 km) |
| Llantrisant to Casa de Oro-Mount Helix (California) | 5,362.80 mi (8,630.59 km) |
| Llantrisant to Casa Grande (Arizona) | 5,174.24 mi (8,327.13 km) |
| Llantrisant to Casas Adobes (Arizona) | 5,178.30 mi (8,333.67 km) |
| Llantrisant to Cascades (Virginia) | 3,538.97 mi (5,695.42 km) |
| Llantrisant to Casper (Wyoming) | 4,457.43 mi (7,173.53 km) |
| Llantrisant to Casselberry (Florida) | 4,193.18 mi (6,748.27 km) |
| Llantrisant to Castaic (California) | 5,321.67 mi (8,564.40 km) |
| Llantrisant to Castle Pines (Colorado) | 4,580.65 mi (7,371.85 km) |
