| Glen Carbon to Cibolo (Texas) | 789.74 mi (1,270.97 km) |
| Glen Carbon to Cicero (Illinois) | 243.28 mi (391.53 km) |
| Glen Carbon to Cimarron Hills (Colorado) | 791.56 mi (1,273.89 km) |
| Glen Carbon to Cincinnati (Ohio) | 295.40 mi (475.40 km) |
| Glen Carbon to Cinco Ranch (Texas) | 704.72 mi (1,134.13 km) |
| Glen Carbon to Circleville (Ohio) | 381.93 mi (614.66 km) |
| Glen Carbon to Citrus (California) | 1,577.58 mi (2,538.86 km) |
| Glen Carbon to Citrus Heights (California) | 1,679.12 mi (2,702.28 km) |
| Glen Carbon to Citrus Park (Florida) | 852.54 mi (1,372.03 km) |
| Glen Carbon to Claiborne (Louisiana) | 447.37 mi (719.97 km) |
| Glen Carbon to Claremont (California) | 1,567.99 mi (2,523.44 km) |
| Glen Carbon to Claremont (New Hampshire) | 970.78 mi (1,562.32 km) |
| Glen Carbon to Claremore (Oklahoma) | 351.41 mi (565.54 km) |
| Glen Carbon to Clarksburg (Maryland) | 683.09 mi (1,099.33 km) |
| Glen Carbon to Clarksburg (West Virginia) | 519.52 mi (836.08 km) |
