| Willoughby to Cold Springs (Nevada) | 2,008.88 mi (3,232.98 km) |
| Willoughby to Coldwater (Michigan) | 186.10 mi (299.49 km) |
| Willoughby to Colesville (Maryland) | 292.25 mi (470.32 km) |
| Willoughby to College (Alaska) | 2,986.92 mi (4,806.99 km) |
| Willoughby to College Park (Georgia) | 578.00 mi (930.20 km) |
| Willoughby to College Park (Maryland) | 298.40 mi (480.23 km) |
| Willoughby to College Station (Texas) | 1,125.87 mi (1,811.91 km) |
| Willoughby to Collegedale (Tennessee) | 496.30 mi (798.71 km) |
| Willoughby to Colleyville (Texas) | 1,053.18 mi (1,694.94 km) |
| Willoughby to Collierville (Tennessee) | 639.46 mi (1,029.12 km) |
| Willoughby to Collinsville (Illinois) | 497.88 mi (801.26 km) |
| Willoughby to Colonia (New Jersey) | 376.22 mi (605.46 km) |
| Willoughby to Colonial Heights (Virginia) | 370.60 mi (596.43 km) |
| Willoughby to Colonial Park (Pennsylvania) | 257.42 mi (414.28 km) |
| Willoughby to Colorado Springs (Colorado) | 1,242.29 mi (1,999.27 km) |
