| Prospect Heights to Castle Pines (Colorado) | 903.43 mi (1,453.93 km) |
| Prospect Heights to Castle Rock (Colorado) | 904.33 mi (1,455.38 km) |
| Prospect Heights to Castro Valley (California) | 1,822.11 mi (2,932.41 km) |
| Prospect Heights to Catalina Foothills (Arizona) | 1,426.89 mi (2,296.35 km) |
| Prospect Heights to Cataño (Puerto Rico) | 2,075.83 mi (3,340.73 km) |
| Prospect Heights to Cathedral City (California) | 1,646.64 mi (2,650.02 km) |
| Prospect Heights to Catonsville (Maryland) | 617.40 mi (993.61 km) |
| Prospect Heights to Cave Spring (Virginia) | 539.07 mi (867.55 km) |
| Prospect Heights to Cayce (South Carolina) | 676.28 mi (1,088.37 km) |
| Prospect Heights to Cayey (Puerto Rico) | 2,093.80 mi (3,369.64 km) |
| Prospect Heights to Cedar City (Utah) | 1,363.39 mi (2,194.16 km) |
| Prospect Heights to Cedar Falls (Iowa) | 233.04 mi (375.05 km) |
| Prospect Heights to Cedar Hill (Texas) | 823.01 mi (1,324.51 km) |
| Prospect Heights to Cedar Lake (Indiana) | 56.63 mi (91.13 km) |
| Prospect Heights to Cedar Mill (Oregon) | 1,740.70 mi (2,801.38 km) |
