| Glen Carbon to Cloverleaf (Texas) | 686.63 mi (1,105.03 km) |
| Glen Carbon to Cloverly (Maryland) | 697.60 mi (1,122.68 km) |
| Glen Carbon to Clovis (California) | 1,620.01 mi (2,607.16 km) |
| Glen Carbon to Clovis (New Mexico) | 790.28 mi (1,271.84 km) |
| Glen Carbon to Clute (Texas) | 740.32 mi (1,191.43 km) |
| Glen Carbon to Coachella (California) | 1,494.04 mi (2,404.42 km) |
| Glen Carbon to Coalinga (California) | 1,666.44 mi (2,681.88 km) |
| Glen Carbon to Coamo (Puerto Rico) | 2,013.14 mi (3,239.84 km) |
| Glen Carbon to Coatesville (Pennsylvania) | 760.36 mi (1,223.68 km) |
| Glen Carbon to Cockeysville (Maryland) | 716.86 mi (1,153.67 km) |
| Glen Carbon to Cocoa (Florida) | 890.73 mi (1,433.49 km) |
| Glen Carbon to Cocoa Beach (Florida) | 898.33 mi (1,445.73 km) |
| Glen Carbon to Coconut Creek (Florida) | 1,032.48 mi (1,661.62 km) |
| Glen Carbon to Coeur d'Alene (Idaho) | 1,474.64 mi (2,373.20 km) |
| Glen Carbon to Cohoes (New York) | 894.00 mi (1,438.75 km) |
