| Willoughby to Conyers (Georgia) | 569.26 mi (916.13 km) |
| Willoughby to Cookeville (Tennessee) | 439.13 mi (706.72 km) |
| Willoughby to Coolidge (Arizona) | 1,750.65 mi (2,817.39 km) |
| Willoughby to Coon Rapids (Minnesota) | 644.41 mi (1,037.08 km) |
| Willoughby to Cooper City (Florida) | 1,079.72 mi (1,737.64 km) |
| Willoughby to Coos Bay (Oregon) | 2,160.29 mi (3,476.66 km) |
| Willoughby to Copiague (New York) | 422.25 mi (679.54 km) |
| Willoughby to Coppell (Texas) | 1,042.91 mi (1,678.40 km) |
| Willoughby to Copperas Cove (Texas) | 1,167.75 mi (1,879.32 km) |
| Willoughby to Coral Gables (Florida) | 1,103.41 mi (1,775.76 km) |
| Willoughby to Coral Springs (Florida) | 1,064.37 mi (1,712.94 km) |
| Willoughby to Coral Terrace (Florida) | 1,100.35 mi (1,770.84 km) |
| Willoughby to Coralville (Iowa) | 525.52 mi (845.75 km) |
| Willoughby to Coram (New York) | 439.40 mi (707.15 km) |
| Willoughby to Corcoran (California) | 2,070.81 mi (3,332.64 km) |
