| Alton to Cloverly (Maryland) | 3,627.20 mi (5,837.41 km) |
| Alton to Clovis (California) | 5,317.36 mi (8,557.47 km) |
| Alton to Clovis (New Mexico) | 4,883.08 mi (7,858.56 km) |
| Alton to Clute (Texas) | 4,863.58 mi (7,827.18 km) |
| Alton to Coachella (California) | 5,380.62 mi (8,659.27 km) |
| Alton to Coalinga (California) | 5,376.57 mi (8,652.76 km) |
| Alton to Coamo (Puerto Rico) | 4,191.11 mi (6,744.94 km) |
| Alton to Coatesville (Pennsylvania) | 3,540.10 mi (5,697.24 km) |
| Alton to Cockeysville (Maryland) | 3,595.46 mi (5,786.33 km) |
| Alton to Cocoa (Florida) | 4,290.31 mi (6,904.59 km) |
| Alton to Cocoa Beach (Florida) | 4,286.80 mi (6,898.94 km) |
| Alton to Coconut Creek (Florida) | 4,369.96 mi (7,032.78 km) |
| Alton to Coeur d'Alene (Idaho) | 4,622.87 mi (7,439.79 km) |
| Alton to Cohoes (New York) | 3,335.43 mi (5,367.85 km) |
| Alton to Cold Springs (Nevada) | 5,163.32 mi (8,309.56 km) |
