| Gaithersburg to Delaware (Ohio) | 321.44 mi (517.31 km) |
| Gaithersburg to Delhi (California) | 2,342.79 mi (3,770.36 km) |
| Gaithersburg to Delray Beach (Florida) | 891.73 mi (1,435.10 km) |
| Gaithersburg to Deltona (Florida) | 742.77 mi (1,195.38 km) |
| Gaithersburg to Deming (New Mexico) | 1,768.82 mi (2,846.63 km) |
| Gaithersburg to Denison (Texas) | 1,135.77 mi (1,827.85 km) |
| Gaithersburg to Dent (Ohio) | 398.86 mi (641.90 km) |
| Gaithersburg to Denton (Texas) | 1,181.22 mi (1,901.00 km) |
| Gaithersburg to Dentsville (South Carolina) | 406.42 mi (654.07 km) |
| Gaithersburg to Denver (Colorado) | 1,470.66 mi (2,366.80 km) |
| Gaithersburg to Depew (New York) | 272.30 mi (438.22 km) |
| Gaithersburg to Derby (Connecticut) | 265.26 mi (426.90 km) |
| Gaithersburg to Derby (Kansas) | 1,089.27 mi (1,753.01 km) |
| Gaithersburg to Des Moines (Iowa) | 878.24 mi (1,413.39 km) |
| Gaithersburg to Des Moines (Washington) | 2,305.42 mi (3,710.22 km) |
