| Alton to Caguas (Puerto Rico) | 4,169.03 mi (6,709.41 km) |
| Alton to Cahokia (Illinois) | 4,180.59 mi (6,728.01 km) |
| Alton to Calabasas (California) | 5,438.40 mi (8,752.26 km) |
| Alton to Caldwell (Idaho) | 4,841.71 mi (7,791.97 km) |
| Alton to Caledonia (Wisconsin) | 3,893.86 mi (6,266.56 km) |
| Alton to Calera (Alabama) | 4,306.69 mi (6,930.95 km) |
| Alton to Calexico (California) | 5,415.32 mi (8,715.11 km) |
| Alton to Calhoun (Georgia) | 4,166.61 mi (6,705.51 km) |
| Alton to California (Maryland) | 3,642.37 mi (5,861.83 km) |
| Alton to California City (California) | 5,354.66 mi (8,617.49 km) |
| Alton to Callaway (Florida) | 4,404.98 mi (7,089.13 km) |
| Alton to Calumet City (Illinois) | 3,935.56 mi (6,333.67 km) |
| Alton to Calverton (Maryland) | 3,627.26 mi (5,837.52 km) |
| Alton to Camano (Washington) | 4,752.17 mi (7,647.88 km) |
| Alton to Camarillo (California) | 5,445.26 mi (8,763.30 km) |
