| Llantrisant to Cookeville (Tennessee) | 4,004.11 mi (6,444.00 km) |
| Llantrisant to Coolidge (Arizona) | 5,164.22 mi (8,311.01 km) |
| Llantrisant to Coon Rapids (Minnesota) | 3,884.90 mi (6,252.15 km) |
| Llantrisant to Cooper City (Florida) | 4,279.70 mi (6,887.51 km) |
| Llantrisant to Coos Bay (Oregon) | 4,987.41 mi (8,026.47 km) |
| Llantrisant to Copiague (New York) | 3,303.64 mi (5,316.70 km) |
| Llantrisant to Coppell (Texas) | 4,618.76 mi (7,433.18 km) |
| Llantrisant to Copperas Cove (Texas) | 4,749.61 mi (7,643.77 km) |
| Llantrisant to Coral Gables (Florida) | 4,296.30 mi (6,914.23 km) |
| Llantrisant to Coral Springs (Florida) | 4,267.30 mi (6,867.56 km) |
| Llantrisant to Coral Terrace (Florida) | 4,295.58 mi (6,913.07 km) |
| Llantrisant to Coralville (Iowa) | 3,982.16 mi (6,408.66 km) |
| Llantrisant to Coram (New York) | 3,278.76 mi (5,276.65 km) |
| Llantrisant to Corcoran (California) | 5,261.38 mi (8,467.37 km) |
| Llantrisant to Cordele (Georgia) | 4,134.13 mi (6,653.24 km) |
