| Thornton to Castle Rock (Colorado) | 4,549.78 mi (7,322.16 km) |
| Thornton to Castro Valley (California) | 5,183.98 mi (8,342.81 km) |
| Thornton to Catalina Foothills (Arizona) | 5,142.82 mi (8,276.58 km) |
| Thornton to Cataño (Puerto Rico) | 4,153.48 mi (6,684.38 km) |
| Thornton to Cathedral City (California) | 5,238.94 mi (8,431.26 km) |
| Thornton to Catonsville (Maryland) | 3,520.95 mi (5,666.43 km) |
| Thornton to Cave Spring (Virginia) | 3,746.36 mi (6,029.19 km) |
| Thornton to Cayce (South Carolina) | 3,948.65 mi (6,354.74 km) |
| Thornton to Cayey (Puerto Rico) | 4,171.85 mi (6,713.94 km) |
| Thornton to Cedar City (Utah) | 4,912.95 mi (7,906.63 km) |
| Thornton to Cedar Falls (Iowa) | 3,956.78 mi (6,367.82 km) |
| Thornton to Cedar Hill (Texas) | 4,631.71 mi (7,454.02 km) |
| Thornton to Cedar Lake (Indiana) | 3,830.08 mi (6,163.92 km) |
| Thornton to Cedar Mill (Oregon) | 4,747.67 mi (7,640.64 km) |
| Thornton to Cedar Park (Texas) | 4,774.47 mi (7,683.77 km) |
