| Gaithersburg to Hicksville (New York) | 225.45 mi (362.83 km) |
| Gaithersburg to Hidalgo (Texas) | 1,512.87 mi (2,434.73 km) |
| Gaithersburg to High Point (North Carolina) | 265.24 mi (426.86 km) |
| Gaithersburg to Highland (California) | 2,224.33 mi (3,579.72 km) |
| Gaithersburg to Highland (Illinois) | 669.95 mi (1,078.18 km) |
| Gaithersburg to Highland (Indiana) | 564.34 mi (908.22 km) |
| Gaithersburg to Highland (Utah) | 1,826.69 mi (2,939.77 km) |
| Gaithersburg to Highland City (Florida) | 816.94 mi (1,314.73 km) |
| Gaithersburg to Highland Park (Illinois) | 593.52 mi (955.17 km) |
| Gaithersburg to Highland Park (New Jersey) | 175.34 mi (282.18 km) |
| Gaithersburg to Highland Springs (Virginia) | 109.55 mi (176.31 km) |
| Gaithersburg to Highland Village (Texas) | 1,180.94 mi (1,900.55 km) |
| Gaithersburg to Highlands Ranch (Colorado) | 1,477.67 mi (2,378.08 km) |
| Gaithersburg to Hillcrest (California) | 2,290.09 mi (3,685.55 km) |
| Gaithersburg to Hillcrest Heights (Maryland) | 24.51 mi (39.45 km) |
