| Rock Island to Carlsbad (California) | 1,568.86 mi (2,524.83 km) |
| Rock Island to Carlsbad (New Mexico) | 978.39 mi (1,574.56 km) |
| Rock Island to Carmel (Indiana) | 254.51 mi (409.59 km) |
| Rock Island to Carmichael (California) | 1,629.12 mi (2,621.82 km) |
| Rock Island to Carney (Maryland) | 752.09 mi (1,210.37 km) |
| Rock Island to Carnot-Moon (Pennsylvania) | 544.17 mi (875.76 km) |
| Rock Island to Carol Stream (Illinois) | 130.23 mi (209.59 km) |
| Rock Island to Carolina (Puerto Rico) | 2,154.55 mi (3,467.42 km) |
| Rock Island to Carolina Forest (South Carolina) | 830.10 mi (1,335.91 km) |
| Rock Island to Carpentersville (Illinois) | 126.43 mi (203.47 km) |
| Rock Island to Carpinteria (California) | 1,641.69 mi (2,642.04 km) |
| Rock Island to Carrboro (North Carolina) | 727.71 mi (1,171.14 km) |
| Rock Island to Carroll (Iowa) | 224.49 mi (361.28 km) |
| Rock Island to Carrollton (Georgia) | 622.42 mi (1,001.69 km) |
| Rock Island to Carrollton (Texas) | 680.80 mi (1,095.65 km) |
