| Alton to Carson (California) | 5,442.05 mi (8,758.13 km) |
| Alton to Carson City (Nevada) | 5,187.11 mi (8,347.85 km) |
| Alton to Carteret (New Jersey) | 3,448.70 mi (5,550.15 km) |
| Alton to Cartersville (Georgia) | 4,176.69 mi (6,721.73 km) |
| Alton to Carthage (Missouri) | 4,409.77 mi (7,096.84 km) |
| Alton to Cary (Illinois) | 3,934.88 mi (6,332.58 km) |
| Alton to Cary (North Carolina) | 3,853.27 mi (6,201.24 km) |
| Alton to Casa de Oro-Mount Helix (California) | 5,460.44 mi (8,787.73 km) |
| Alton to Casa Grande (Arizona) | 5,274.39 mi (8,488.31 km) |
| Alton to Casas Adobes (Arizona) | 5,279.01 mi (8,495.75 km) |
| Alton to Cascades (Virginia) | 3,645.81 mi (5,867.36 km) |
| Alton to Casper (Wyoming) | 4,555.32 mi (7,331.08 km) |
| Alton to Casselberry (Florida) | 4,299.96 mi (6,920.12 km) |
| Alton to Castaic (California) | 5,417.59 mi (8,718.77 km) |
| Alton to Castle Pines (Colorado) | 4,680.90 mi (7,533.18 km) |
