| Llantwit Major to Castle Rock (Colorado) | 4,586.21 mi (7,380.79 km) |
| Llantwit Major to Castro Valley (California) | 5,251.12 mi (8,450.86 km) |
| Llantwit Major to Catalina Foothills (Arizona) | 5,177.35 mi (8,332.15 km) |
| Llantwit Major to Cataño (Puerto Rico) | 4,058.67 mi (6,531.80 km) |
| Llantwit Major to Cathedral City (California) | 5,288.11 mi (8,510.39 km) |
| Llantwit Major to Catonsville (Maryland) | 3,501.31 mi (5,634.82 km) |
| Llantwit Major to Cave Spring (Virginia) | 3,727.51 mi (5,998.85 km) |
| Llantwit Major to Cayce (South Carolina) | 3,923.14 mi (6,313.68 km) |
| Llantwit Major to Cayey (Puerto Rico) | 4,076.46 mi (6,560.43 km) |
| Llantwit Major to Cedar City (Utah) | 4,962.24 mi (7,985.96 km) |
| Llantwit Major to Cedar Falls (Iowa) | 3,976.97 mi (6,400.31 km) |
| Llantwit Major to Cedar Hill (Texas) | 4,636.97 mi (7,462.49 km) |
| Llantwit Major to Cedar Lake (Indiana) | 3,837.64 mi (6,176.09 km) |
| Llantwit Major to Cedar Mill (Oregon) | 4,829.02 mi (7,771.56 km) |
| Llantwit Major to Cedar Park (Texas) | 4,777.07 mi (7,687.95 km) |
