| Rock Island to Camarillo (California) | 1,622.38 mi (2,610.97 km) |
| Rock Island to Camas (Washington) | 1,609.56 mi (2,590.34 km) |
| Rock Island to Cambridge (Maryland) | 792.53 mi (1,275.45 km) |
| Rock Island to Cambridge (Massachusetts) | 1,000.39 mi (1,609.97 km) |
| Rock Island to Camden (Arkansas) | 559.88 mi (901.04 km) |
| Rock Island to Camden (New Jersey) | 816.37 mi (1,313.83 km) |
| Rock Island to Cameron Park (California) | 1,610.76 mi (2,592.27 km) |
| Rock Island to Camp Pendleton South (California) | 1,570.75 mi (2,527.88 km) |
| Rock Island to Camp Springs (Maryland) | 743.92 mi (1,197.22 km) |
| Rock Island to Camp Verde (Arizona) | 1,248.08 mi (2,008.59 km) |
| Rock Island to Campbell (California) | 1,690.80 mi (2,721.07 km) |
| Rock Island to Campbellsville (Kentucky) | 398.91 mi (641.98 km) |
| Rock Island to Campton Hills (Illinois) | 116.54 mi (187.55 km) |
| Rock Island to Canby (Oregon) | 1,622.67 mi (2,611.44 km) |
| Rock Island to Candelaria (Puerto Rico) | 2,145.23 mi (3,452.42 km) |
