| Alton to Caño Martin Peña (Puerto Rico) | 4,159.15 mi (6,693.51 km) |
| Alton to Cañon City (Colorado) | 4,746.42 mi (7,638.63 km) |
| Alton to Canóvanas (Puerto Rico) | 4,155.93 mi (6,688.33 km) |
| Alton to Canton (Georgia) | 4,159.97 mi (6,694.82 km) |
| Alton to Canton (Illinois) | 4,080.28 mi (6,566.58 km) |
| Alton to Canton (Mississippi) | 4,466.31 mi (7,187.83 km) |
| Alton to Canton (Ohio) | 3,728.94 mi (6,001.15 km) |
| Alton to Canyon (Texas) | 4,806.88 mi (7,735.92 km) |
| Alton to Canyon Lake (California) | 5,417.88 mi (8,719.23 km) |
| Alton to Canyon Lake (Texas) | 4,933.22 mi (7,939.24 km) |
| Alton to Cape Coral (Florida) | 4,429.00 mi (7,127.78 km) |
| Alton to Cape Girardeau (Missouri) | 4,216.57 mi (6,785.92 km) |
| Alton to Carbondale (Illinois) | 4,183.58 mi (6,732.82 km) |
| Alton to Carlisle (Pennsylvania) | 3,587.40 mi (5,773.36 km) |
| Alton to Carlsbad (California) | 5,450.50 mi (8,771.73 km) |
