| Llantrisant to Castle Rock (Colorado) | 4,584.49 mi (7,378.03 km) |
| Llantrisant to Castro Valley (California) | 5,247.65 mi (8,445.27 km) |
| Llantrisant to Catalina Foothills (Arizona) | 5,175.79 mi (8,329.62 km) |
| Llantrisant to Cataño (Puerto Rico) | 4,064.48 mi (6,541.15 km) |
| Llantrisant to Cathedral City (California) | 5,285.69 mi (8,506.49 km) |
| Llantrisant to Catonsville (Maryland) | 3,502.77 mi (5,637.16 km) |
| Llantrisant to Cave Spring (Virginia) | 3,728.94 mi (6,001.15 km) |
| Llantrisant to Cayce (South Carolina) | 3,924.97 mi (6,316.63 km) |
| Llantrisant to Cayey (Puerto Rico) | 4,082.31 mi (6,569.84 km) |
| Llantrisant to Cedar City (Utah) | 4,959.80 mi (7,982.02 km) |
| Llantrisant to Cedar Falls (Iowa) | 3,976.16 mi (6,399.00 km) |
| Llantrisant to Cedar Hill (Texas) | 4,637.07 mi (7,462.64 km) |
| Llantrisant to Cedar Lake (Indiana) | 3,837.55 mi (6,175.94 km) |
| Llantrisant to Cedar Mill (Oregon) | 4,824.69 mi (7,764.59 km) |
| Llantrisant to Cedar Park (Texas) | 4,777.33 mi (7,688.37 km) |
