| Gaithersburg to Cibolo (Texas) | 1,363.44 mi (2,194.24 km) |
| Gaithersburg to Cicero (Illinois) | 584.48 mi (940.63 km) |
| Gaithersburg to Cimarron Hills (Colorado) | 1,470.40 mi (2,366.38 km) |
| Gaithersburg to Cincinnati (Ohio) | 390.73 mi (628.81 km) |
| Gaithersburg to Cinco Ranch (Texas) | 1,236.64 mi (1,990.19 km) |
| Gaithersburg to Circleville (Ohio) | 307.22 mi (494.42 km) |
| Gaithersburg to Citrus (California) | 2,262.94 mi (3,641.84 km) |
| Gaithersburg to Citrus Heights (California) | 2,345.83 mi (3,775.25 km) |
| Gaithersburg to Citrus Park (Florida) | 823.53 mi (1,325.34 km) |
| Gaithersburg to Claiborne (Louisiana) | 953.36 mi (1,534.28 km) |
| Gaithersburg to Claremont (California) | 2,253.40 mi (3,626.50 km) |
| Gaithersburg to Claremont (New Hampshire) | 387.35 mi (623.38 km) |
| Gaithersburg to Claremore (Oklahoma) | 1,022.20 mi (1,645.07 km) |
| Gaithersburg to Clarksburg (Maryland) | 6.83 mi (10.99 km) |
| Gaithersburg to Clarksburg (West Virginia) | 166.82 mi (268.47 km) |
