| Willoughby to Cibolo (Texas) | 1,255.93 mi (2,021.23 km) |
| Willoughby to Cicero (Illinois) | 327.61 mi (527.24 km) |
| Willoughby to Cimarron Hills (Colorado) | 1,239.29 mi (1,994.44 km) |
| Willoughby to Cincinnati (Ohio) | 237.70 mi (382.54 km) |
| Willoughby to Cinco Ranch (Texas) | 1,148.16 mi (1,847.78 km) |
| Willoughby to Circleville (Ohio) | 162.03 mi (260.75 km) |
| Willoughby to Citrus (California) | 2,039.88 mi (3,282.86 km) |
| Willoughby to Citrus Heights (California) | 2,096.55 mi (3,374.07 km) |
| Willoughby to Citrus Park (Florida) | 940.05 mi (1,512.87 km) |
| Willoughby to Claiborne (Louisiana) | 864.43 mi (1,391.16 km) |
| Willoughby to Claremont (California) | 2,030.62 mi (3,267.96 km) |
| Willoughby to Claremont (New Hampshire) | 477.02 mi (767.68 km) |
| Willoughby to Claremore (Oklahoma) | 845.60 mi (1,360.87 km) |
| Willoughby to Clarksburg (Maryland) | 274.62 mi (441.96 km) |
| Willoughby to Clarksburg (West Virginia) | 172.73 mi (277.98 km) |
