| Prospect Heights to Carlsbad (California) | 1,711.85 mi (2,754.96 km) |
| Prospect Heights to Carlsbad (New Mexico) | 1,116.68 mi (1,797.13 km) |
| Prospect Heights to Carmel (Indiana) | 174.50 mi (280.83 km) |
| Prospect Heights to Carmichael (California) | 1,763.14 mi (2,837.50 km) |
| Prospect Heights to Carney (Maryland) | 624.72 mi (1,005.38 km) |
| Prospect Heights to Carnot-Moon (Pennsylvania) | 414.63 mi (667.29 km) |
| Prospect Heights to Carol Stream (Illinois) | 16.57 mi (26.66 km) |
| Prospect Heights to Carolina (Puerto Rico) | 2,083.64 mi (3,353.29 km) |
| Prospect Heights to Carolina Forest (South Carolina) | 756.20 mi (1,216.99 km) |
| Prospect Heights to Carpentersville (Illinois) | 18.65 mi (30.01 km) |
| Prospect Heights to Carpinteria (California) | 1,783.00 mi (2,869.47 km) |
| Prospect Heights to Carrboro (North Carolina) | 637.61 mi (1,026.13 km) |
| Prospect Heights to Carroll (Iowa) | 355.66 mi (572.38 km) |
| Prospect Heights to Carrollton (Georgia) | 608.80 mi (979.78 km) |
| Prospect Heights to Carrollton (Texas) | 797.91 mi (1,284.11 km) |
