| Grayslake to Conyers (Georgia) | 638.26 mi (1,027.19 km) |
| Grayslake to Cookeville (Tennessee) | 448.58 mi (721.92 km) |
| Grayslake to Coolidge (Arizona) | 1,433.58 mi (2,307.13 km) |
| Grayslake to Coon Rapids (Minnesota) | 328.03 mi (527.92 km) |
| Grayslake to Cooper City (Florida) | 1,208.41 mi (1,944.75 km) |
| Grayslake to Coos Bay (Oregon) | 1,820.32 mi (2,929.52 km) |
| Grayslake to Copiague (New York) | 765.35 mi (1,231.72 km) |
| Grayslake to Coppell (Texas) | 811.23 mi (1,305.55 km) |
| Grayslake to Copperas Cove (Texas) | 947.44 mi (1,524.75 km) |
| Grayslake to Coral Gables (Florida) | 1,231.07 mi (1,981.21 km) |
| Grayslake to Coral Springs (Florida) | 1,194.39 mi (1,922.19 km) |
| Grayslake to Coral Terrace (Florida) | 1,227.60 mi (1,975.63 km) |
| Grayslake to Coralville (Iowa) | 188.16 mi (302.82 km) |
| Grayslake to Coram (New York) | 781.80 mi (1,258.19 km) |
| Grayslake to Corcoran (California) | 1,731.44 mi (2,786.48 km) |
