| Round Lake Beach to Candler-McAfee (Georgia) | 632.53 mi (1,017.96 km) |
| Round Lake Beach to Caño Martin Peña (Puerto Rico) | 2,098.64 mi (3,377.44 km) |
| Round Lake Beach to Cañon City (Colorado) | 939.89 mi (1,512.61 km) |
| Round Lake Beach to Canóvanas (Puerto Rico) | 2,107.59 mi (3,391.83 km) |
| Round Lake Beach to Canton (Georgia) | 594.51 mi (956.78 km) |
| Round Lake Beach to Canton (Illinois) | 161.35 mi (259.66 km) |
| Round Lake Beach to Canton (Mississippi) | 684.19 mi (1,101.11 km) |
| Round Lake Beach to Canton (Ohio) | 363.38 mi (584.80 km) |
| Round Lake Beach to Canyon (Texas) | 902.36 mi (1,452.21 km) |
| Round Lake Beach to Canyon Lake (California) | 1,687.54 mi (2,715.83 km) |
| Round Lake Beach to Canyon Lake (Texas) | 1,032.18 mi (1,661.14 km) |
| Round Lake Beach to Cape Coral (Florida) | 1,140.22 mi (1,835.01 km) |
| Round Lake Beach to Cape Girardeau (Missouri) | 358.84 mi (577.49 km) |
| Round Lake Beach to Carbondale (Illinois) | 327.38 mi (526.87 km) |
| Round Lake Beach to Carlisle (Pennsylvania) | 583.98 mi (939.83 km) |
