| Alton to Cicero (Illinois) | 3,932.99 mi (6,329.53 km) |
| Alton to Cimarron Hills (Colorado) | 4,706.26 mi (7,574.00 km) |
| Alton to Cincinnati (Ohio) | 3,929.87 mi (6,324.51 km) |
| Alton to Cinco Ranch (Texas) | 4,841.25 mi (7,791.23 km) |
| Alton to Circleville (Ohio) | 3,845.70 mi (6,189.06 km) |
| Alton to Citrus (California) | 5,414.25 mi (8,713.40 km) |
| Alton to Citrus Heights (California) | 5,259.81 mi (8,464.85 km) |
| Alton to Citrus Park (Florida) | 4,381.73 mi (7,051.71 km) |
| Alton to Claiborne (Louisiana) | 4,556.39 mi (7,332.80 km) |
| Alton to Claremont (California) | 5,408.01 mi (8,703.35 km) |
| Alton to Claremont (New Hampshire) | 3,254.87 mi (5,238.21 km) |
| Alton to Claremore (Oklahoma) | 4,500.79 mi (7,243.33 km) |
| Alton to Clarksburg (Maryland) | 3,632.91 mi (5,846.60 km) |
| Alton to Clarksburg (West Virginia) | 3,754.97 mi (6,043.05 km) |
| Alton to Clarksdale (Mississippi) | 4,408.80 mi (7,095.27 km) |
