| Round Lake Beach to Isabela (Puerto Rico) | 2,060.24 mi (3,315.64 km) |
| Round Lake Beach to Iselin (New Jersey) | 722.58 mi (1,162.88 km) |
| Round Lake Beach to Isla Vista (California) | 1,794.73 mi (2,888.34 km) |
| Round Lake Beach to Issaquah (Washington) | 1,684.22 mi (2,710.49 km) |
| Round Lake Beach to Ithaca (New York) | 590.18 mi (949.80 km) |
| Round Lake Beach to Ives Estates (Florida) | 1,219.38 mi (1,962.40 km) |
| Round Lake Beach to Jackson (Michigan) | 188.11 mi (302.73 km) |
| Round Lake Beach to Jackson (Mississippi) | 705.03 mi (1,134.64 km) |
| Round Lake Beach to Jackson (Missouri) | 355.34 mi (571.87 km) |
| Round Lake Beach to Jackson (Tennessee) | 466.43 mi (750.64 km) |
| Round Lake Beach to Jackson (Wyoming) | 1,147.05 mi (1,845.99 km) |
| Round Lake Beach to Jacksonville (Alabama) | 605.44 mi (974.37 km) |
| Round Lake Beach to Jacksonville (Arkansas) | 562.12 mi (904.65 km) |
| Round Lake Beach to Jacksonville (Florida) | 904.77 mi (1,456.09 km) |
| Round Lake Beach to Jacksonville (Illinois) | 214.64 mi (345.43 km) |
