| Round Lake Beach to Delaware (Ohio) | 297.27 mi (478.41 km) |
| Round Lake Beach to Delhi (California) | 1,755.00 mi (2,824.39 km) |
| Round Lake Beach to Delray Beach (Florida) | 1,189.39 mi (1,914.14 km) |
| Round Lake Beach to Deltona (Florida) | 1,006.77 mi (1,620.24 km) |
| Round Lake Beach to Deming (New Mexico) | 1,282.27 mi (2,063.62 km) |
| Round Lake Beach to Denison (Texas) | 752.66 mi (1,211.29 km) |
| Round Lake Beach to Dent (Ohio) | 283.74 mi (456.63 km) |
| Round Lake Beach to Denton (Texas) | 802.34 mi (1,291.23 km) |
| Round Lake Beach to Dentsville (South Carolina) | 691.34 mi (1,112.61 km) |
| Round Lake Beach to Denver (Colorado) | 891.75 mi (1,435.13 km) |
| Round Lake Beach to Depew (New York) | 477.72 mi (768.82 km) |
| Round Lake Beach to Derby (Connecticut) | 774.26 mi (1,246.06 km) |
| Round Lake Beach to Derby (Kansas) | 588.52 mi (947.13 km) |
| Round Lake Beach to Des Moines (Iowa) | 289.38 mi (465.72 km) |
| Round Lake Beach to Des Moines (Washington) | 1,696.89 mi (2,730.88 km) |
