| Grayslake to Cordele (Georgia) | 754.66 mi (1,214.51 km) |
| Grayslake to Corinth (Mississippi) | 511.47 mi (823.13 km) |
| Grayslake to Corinth (Texas) | 803.62 mi (1,293.30 km) |
| Grayslake to Cornelius (North Carolina) | 610.31 mi (982.20 km) |
| Grayslake to Cornelius (Oregon) | 1,742.24 mi (2,803.86 km) |
| Grayslake to Corning (New York) | 561.27 mi (903.28 km) |
| Grayslake to Corona (California) | 1,698.78 mi (2,733.92 km) |
| Grayslake to Coronado (California) | 1,720.00 mi (2,768.07 km) |
| Grayslake to Corpus Christi (Texas) | 1,138.04 mi (1,831.50 km) |
| Grayslake to Corsicana (Texas) | 846.14 mi (1,361.73 km) |
| Grayslake to Cortland (New York) | 603.98 mi (972.02 km) |
| Grayslake to Corvallis (Oregon) | 1,760.61 mi (2,833.43 km) |
| Grayslake to Coshocton (Ohio) | 351.63 mi (565.89 km) |
| Grayslake to Costa Mesa (California) | 1,722.82 mi (2,772.61 km) |
| Grayslake to Coto de Caza (California) | 1,708.77 mi (2,750.01 km) |
