| Glen Carbon to Clemson (South Carolina) | 486.48 mi (782.92 km) |
| Glen Carbon to Clermont (Florida) | 850.56 mi (1,368.84 km) |
| Glen Carbon to Cleveland (Mississippi) | 348.92 mi (561.53 km) |
| Glen Carbon to Cleveland (Ohio) | 476.90 mi (767.49 km) |
| Glen Carbon to Cleveland (Tennessee) | 374.95 mi (603.42 km) |
| Glen Carbon to Cleveland Heights (Ohio) | 483.41 mi (777.97 km) |
| Glen Carbon to Cliffside Park (New Jersey) | 859.79 mi (1,383.69 km) |
| Glen Carbon to Clifton (Colorado) | 991.89 mi (1,596.30 km) |
| Glen Carbon to Clifton (New Jersey) | 851.17 mi (1,369.83 km) |
| Glen Carbon to Clinton (Iowa) | 213.62 mi (343.79 km) |
| Glen Carbon to Clinton (Maryland) | 703.95 mi (1,132.90 km) |
| Glen Carbon to Clinton (Mississippi) | 442.93 mi (712.83 km) |
| Glen Carbon to Clinton (Utah) | 1,178.00 mi (1,895.80 km) |
| Glen Carbon to Clive (Iowa) | 281.94 mi (453.75 km) |
| Glen Carbon to Cloquet (Minnesota) | 564.73 mi (908.85 km) |
