| Gaithersburg to Cloverleaf (Texas) | 1,206.40 mi (1,941.51 km) |
| Gaithersburg to Cloverly (Maryland) | 11.61 mi (18.69 km) |
| Gaithersburg to Clovis (California) | 2,297.31 mi (3,697.16 km) |
| Gaithersburg to Clovis (New Mexico) | 1,468.32 mi (2,363.04 km) |
| Gaithersburg to Clute (Texas) | 1,249.49 mi (2,010.86 km) |
| Gaithersburg to Coachella (California) | 2,180.09 mi (3,508.51 km) |
| Gaithersburg to Coalinga (California) | 2,345.69 mi (3,775.03 km) |
| Gaithersburg to Coamo (Puerto Rico) | 1,593.89 mi (2,565.11 km) |
| Gaithersburg to Coatesville (Pennsylvania) | 94.65 mi (152.32 km) |
| Gaithersburg to Cockeysville (Maryland) | 39.30 mi (63.25 km) |
| Gaithersburg to Cocoa (Florida) | 770.29 mi (1,239.66 km) |
| Gaithersburg to Cocoa Beach (Florida) | 771.52 mi (1,241.64 km) |
| Gaithersburg to Coconut Creek (Florida) | 904.63 mi (1,455.86 km) |
| Gaithersburg to Coeur d'Alene (Idaho) | 2,047.85 mi (3,295.70 km) |
| Gaithersburg to Cohoes (New York) | 310.84 mi (500.25 km) |
