| Willoughby to Carlsbad (California) | 2,039.18 mi (3,281.74 km) |
| Willoughby to Carlsbad (New Mexico) | 1,406.09 mi (2,262.89 km) |
| Willoughby to Carmel (Indiana) | 273.59 mi (440.30 km) |
| Willoughby to Carmichael (California) | 2,099.89 mi (3,379.45 km) |
| Willoughby to Carney (Maryland) | 299.58 mi (482.12 km) |
| Willoughby to Carnot-Moon (Pennsylvania) | 99.55 mi (160.21 km) |
| Willoughby to Carol Stream (Illinois) | 346.77 mi (558.07 km) |
| Willoughby to Carolina (Puerto Rico) | 1,845.40 mi (2,969.88 km) |
| Willoughby to Carolina Forest (South Carolina) | 561.26 mi (903.27 km) |
| Willoughby to Carpentersville (Illinois) | 355.40 mi (571.96 km) |
| Willoughby to Carpinteria (California) | 2,115.32 mi (3,404.27 km) |
| Willoughby to Carrboro (North Carolina) | 414.46 mi (667.01 km) |
| Willoughby to Carroll (Iowa) | 692.37 mi (1,114.26 km) |
| Willoughby to Carrollton (Georgia) | 592.22 mi (953.08 km) |
| Willoughby to Carrollton (Texas) | 1,037.77 mi (1,670.13 km) |
