| Round Lake Beach to Cloverleaf (Texas) | 954.93 mi (1,536.81 km) |
| Round Lake Beach to Cloverly (Maryland) | 622.02 mi (1,001.04 km) |
| Round Lake Beach to Clovis (California) | 1,714.93 mi (2,759.91 km) |
| Round Lake Beach to Clovis (New Mexico) | 982.77 mi (1,581.62 km) |
| Round Lake Beach to Clute (Texas) | 1,008.83 mi (1,623.56 km) |
| Round Lake Beach to Coachella (California) | 1,631.54 mi (2,625.71 km) |
| Round Lake Beach to Coalinga (California) | 1,766.44 mi (2,842.81 km) |
| Round Lake Beach to Coamo (Puerto Rico) | 2,108.04 mi (3,392.56 km) |
| Round Lake Beach to Coatesville (Pennsylvania) | 658.04 mi (1,059.01 km) |
| Round Lake Beach to Cockeysville (Maryland) | 629.84 mi (1,013.64 km) |
| Round Lake Beach to Cocoa (Florida) | 1,050.16 mi (1,690.07 km) |
| Round Lake Beach to Cocoa Beach (Florida) | 1,056.41 mi (1,700.13 km) |
| Round Lake Beach to Coconut Creek (Florida) | 1,198.73 mi (1,929.17 km) |
| Round Lake Beach to Coeur d'Alene (Idaho) | 1,440.10 mi (2,317.62 km) |
| Round Lake Beach to Cohoes (New York) | 730.92 mi (1,176.31 km) |
