| Alton to Corinth (Mississippi) | 4,289.48 mi (6,903.25 km) |
| Alton to Corinth (Texas) | 4,717.75 mi (7,592.48 km) |
| Alton to Cornelius (North Carolina) | 3,953.17 mi (6,362.02 km) |
| Alton to Cornelius (Oregon) | 4,919.48 mi (7,917.14 km) |
| Alton to Corning (New York) | 3,497.38 mi (5,628.49 km) |
| Alton to Corona (California) | 5,418.05 mi (8,719.51 km) |
| Alton to Coronado (California) | 5,472.44 mi (8,807.04 km) |
| Alton to Corpus Christi (Texas) | 5,010.42 mi (8,063.50 km) |
| Alton to Corsicana (Texas) | 4,748.63 mi (7,642.18 km) |
| Alton to Cortland (New York) | 3,442.78 mi (5,540.61 km) |
| Alton to Corvallis (Oregon) | 4,980.03 mi (8,014.58 km) |
| Alton to Coshocton (Ohio) | 3,772.59 mi (6,071.39 km) |
| Alton to Costa Mesa (California) | 5,440.54 mi (8,755.71 km) |
| Alton to Coto de Caza (California) | 5,433.80 mi (8,744.86 km) |
| Alton to Cottage Grove (Minnesota) | 3,989.41 mi (6,420.33 km) |
