| Alton to Castle Rock (Colorado) | 4,684.79 mi (7,539.43 km) |
| Alton to Castro Valley (California) | 5,339.83 mi (8,593.62 km) |
| Alton to Catalina Foothills (Arizona) | 5,276.57 mi (8,491.81 km) |
| Alton to Cataño (Puerto Rico) | 4,162.82 mi (6,699.41 km) |
| Alton to Cathedral City (California) | 5,383.11 mi (8,663.29 km) |
| Alton to Catonsville (Maryland) | 3,609.62 mi (5,809.12 km) |
| Alton to Cave Spring (Virginia) | 3,835.78 mi (6,173.09 km) |
| Alton to Cayce (South Carolina) | 4,031.94 mi (6,488.78 km) |
| Alton to Cayey (Puerto Rico) | 4,180.47 mi (6,727.82 km) |
| Alton to Cedar City (Utah) | 5,057.14 mi (8,138.68 km) |
| Alton to Cedar Falls (Iowa) | 4,079.35 mi (6,565.07 km) |
| Alton to Cedar Hill (Texas) | 4,742.32 mi (7,632.03 km) |
| Alton to Cedar Lake (Indiana) | 3,942.45 mi (6,344.77 km) |
| Alton to Cedar Mill (Oregon) | 4,911.71 mi (7,904.64 km) |
| Alton to Cedar Park (Texas) | 4,882.87 mi (7,858.22 km) |
