| Prospect Heights to Clemson (South Carolina) | 582.43 mi (937.33 km) |
| Prospect Heights to Clermont (Florida) | 1,000.10 mi (1,609.50 km) |
| Prospect Heights to Cleveland (Mississippi) | 597.36 mi (961.36 km) |
| Prospect Heights to Cleveland (Ohio) | 324.61 mi (522.40 km) |
| Prospect Heights to Cleveland (Tennessee) | 505.81 mi (814.03 km) |
| Prospect Heights to Cleveland Heights (Ohio) | 330.18 mi (531.37 km) |
| Prospect Heights to Cliffside Park (New Jersey) | 726.30 mi (1,168.87 km) |
| Prospect Heights to Clifton (Colorado) | 1,094.69 mi (1,761.73 km) |
| Prospect Heights to Clifton (New Jersey) | 717.05 mi (1,153.98 km) |
| Prospect Heights to Clinton (Iowa) | 120.24 mi (193.51 km) |
| Prospect Heights to Clinton (Maryland) | 623.65 mi (1,003.66 km) |
| Prospect Heights to Clinton (Mississippi) | 686.53 mi (1,104.86 km) |
| Prospect Heights to Clinton (Utah) | 1,244.42 mi (2,002.69 km) |
| Prospect Heights to Clive (Iowa) | 303.96 mi (489.17 km) |
| Prospect Heights to Cloquet (Minnesota) | 390.48 mi (628.41 km) |
