| Willoughby to Cordele (Georgia) | 682.03 mi (1,097.62 km) |
| Willoughby to Corinth (Mississippi) | 601.76 mi (968.44 km) |
| Willoughby to Corinth (Texas) | 1,038.56 mi (1,671.39 km) |
| Willoughby to Cornelius (North Carolina) | 427.49 mi (687.99 km) |
| Willoughby to Cornelius (Oregon) | 2,077.69 mi (3,343.72 km) |
| Willoughby to Corning (New York) | 226.47 mi (364.47 km) |
| Willoughby to Corona (California) | 2,030.82 mi (3,268.29 km) |
| Willoughby to Coronado (California) | 2,047.59 mi (3,295.27 km) |
| Willoughby to Corpus Christi (Texas) | 1,317.77 mi (2,120.74 km) |
| Willoughby to Corsicana (Texas) | 1,060.06 mi (1,706.00 km) |
| Willoughby to Cortland (New York) | 275.96 mi (444.12 km) |
| Willoughby to Corvallis (Oregon) | 2,098.42 mi (3,377.07 km) |
| Willoughby to Coshocton (Ohio) | 98.34 mi (158.27 km) |
| Willoughby to Costa Mesa (California) | 2,054.73 mi (3,306.78 km) |
| Willoughby to Coto de Caza (California) | 2,040.04 mi (3,283.12 km) |
