| Gaithersburg to Clemson (South Carolina) | 436.01 mi (701.70 km) |
| Gaithersburg to Clermont (Florida) | 776.58 mi (1,249.79 km) |
| Gaithersburg to Cleveland (Mississippi) | 837.30 mi (1,347.51 km) |
| Gaithersburg to Cleveland (Ohio) | 285.58 mi (459.59 km) |
| Gaithersburg to Cleveland (Tennessee) | 502.11 mi (808.06 km) |
| Gaithersburg to Cleveland Heights (Ohio) | 281.87 mi (453.63 km) |
| Gaithersburg to Cliffside Park (New Jersey) | 206.75 mi (332.73 km) |
| Gaithersburg to Clifton (Colorado) | 1,666.95 mi (2,682.70 km) |
| Gaithersburg to Clifton (New Jersey) | 201.02 mi (323.51 km) |
| Gaithersburg to Clinton (Iowa) | 708.92 mi (1,140.90 km) |
| Gaithersburg to Clinton (Maryland) | 31.28 mi (50.34 km) |
| Gaithersburg to Clinton (Mississippi) | 871.19 mi (1,402.05 km) |
| Gaithersburg to Clinton (Utah) | 1,833.90 mi (2,951.37 km) |
| Gaithersburg to Clive (Iowa) | 888.17 mi (1,429.36 km) |
| Gaithersburg to Cloquet (Minnesota) | 931.42 mi (1,498.98 km) |
