| Gaithersburg to Dallas (Oregon) | 2,366.99 mi (3,809.30 km) |
| Gaithersburg to Dallas (Texas) | 1,174.95 mi (1,890.90 km) |
| Gaithersburg to Dalton (Georgia) | 523.62 mi (842.68 km) |
| Gaithersburg to Daly City (California) | 2,426.54 mi (3,905.13 km) |
| Gaithersburg to Damascus (Maryland) | 9.41 mi (15.14 km) |
| Gaithersburg to Damascus (Oregon) | 2,321.14 mi (3,735.51 km) |
| Gaithersburg to Dana Point (California) | 2,268.78 mi (3,651.25 km) |
| Gaithersburg to Danbury (Connecticut) | 251.86 mi (405.33 km) |
| Gaithersburg to Dania Beach (Florida) | 919.44 mi (1,479.70 km) |
| Gaithersburg to Danville (California) | 2,397.94 mi (3,859.11 km) |
| Gaithersburg to Danville (Illinois) | 557.29 mi (896.87 km) |
| Gaithersburg to Danville (Indiana) | 497.25 mi (800.25 km) |
| Gaithersburg to Danville (Kentucky) | 422.32 mi (679.65 km) |
| Gaithersburg to Danville (Virginia) | 213.12 mi (342.98 km) |
| Gaithersburg to Daphne (Alabama) | 842.17 mi (1,355.34 km) |
