| Prospect Heights to Cibolo (Texas) | 1,038.72 mi (1,671.66 km) |
| Prospect Heights to Cicero (Illinois) | 19.88 mi (31.99 km) |
| Prospect Heights to Cimarron Hills (Colorado) | 907.86 mi (1,461.06 km) |
| Prospect Heights to Cincinnati (Ohio) | 272.13 mi (437.95 km) |
| Prospect Heights to Cinco Ranch (Texas) | 959.13 mi (1,543.57 km) |
| Prospect Heights to Circleville (Ohio) | 312.76 mi (503.34 km) |
| Prospect Heights to Citrus (California) | 1,709.47 mi (2,751.13 km) |
| Prospect Heights to Citrus Heights (California) | 1,759.80 mi (2,832.12 km) |
| Prospect Heights to Citrus Park (Florida) | 1,015.19 mi (1,633.79 km) |
| Prospect Heights to Claiborne (Louisiana) | 701.12 mi (1,128.35 km) |
| Prospect Heights to Claremont (California) | 1,700.35 mi (2,736.45 km) |
| Prospect Heights to Claremont (New Hampshire) | 794.80 mi (1,279.11 km) |
| Prospect Heights to Claremore (Oklahoma) | 573.27 mi (922.60 km) |
| Prospect Heights to Clarksburg (Maryland) | 592.59 mi (953.69 km) |
| Prospect Heights to Clarksburg (West Virginia) | 443.12 mi (713.13 km) |
