| Willoughby to Candler-McAfee (Georgia) | 569.03 mi (915.77 km) |
| Willoughby to Caño Martin Peña (Puerto Rico) | 1,841.74 mi (2,964.00 km) |
| Willoughby to Cañon City (Colorado) | 1,274.57 mi (2,051.22 km) |
| Willoughby to Canóvanas (Puerto Rico) | 1,849.91 mi (2,977.14 km) |
| Willoughby to Canton (Georgia) | 537.99 mi (865.81 km) |
| Willoughby to Canton (Illinois) | 455.41 mi (732.91 km) |
| Willoughby to Canton (Mississippi) | 784.29 mi (1,262.20 km) |
| Willoughby to Canton (Ohio) | 57.95 mi (93.25 km) |
| Willoughby to Canyon (Texas) | 1,199.39 mi (1,930.23 km) |
| Willoughby to Canyon Lake (California) | 2,020.50 mi (3,251.69 km) |
| Willoughby to Canyon Lake (Texas) | 1,242.52 mi (1,999.63 km) |
| Willoughby to Cape Coral (Florida) | 1,037.05 mi (1,668.97 km) |
| Willoughby to Cape Girardeau (Missouri) | 527.53 mi (848.97 km) |
| Willoughby to Carbondale (Illinois) | 495.86 mi (798.00 km) |
| Willoughby to Carlisle (Pennsylvania) | 241.15 mi (388.10 km) |
