| Gaithersburg to Clarksdale (Mississippi) | 814.08 mi (1,310.14 km) |
| Gaithersburg to Clarkston (Georgia) | 536.04 mi (862.68 km) |
| Gaithersburg to Clarksville (Indiana) | 464.31 mi (747.23 km) |
| Gaithersburg to Clarksville (Tennessee) | 579.91 mi (933.27 km) |
| Gaithersburg to Clawson (Michigan) | 389.18 mi (626.32 km) |
| Gaithersburg to Clay (Alabama) | 642.99 mi (1,034.78 km) |
| Gaithersburg to Clayton (California) | 2,393.37 mi (3,851.76 km) |
| Gaithersburg to Clayton (Missouri) | 705.63 mi (1,135.61 km) |
| Gaithersburg to Clayton (North Carolina) | 249.54 mi (401.60 km) |
| Gaithersburg to Clayton (Ohio) | 382.65 mi (615.82 km) |
| Gaithersburg to Clearfield (Utah) | 1,832.06 mi (2,948.42 km) |
| Gaithersburg to Clearlake (California) | 2,411.04 mi (3,880.19 km) |
| Gaithersburg to Clearwater (Florida) | 833.91 mi (1,342.05 km) |
| Gaithersburg to Cleburne (Texas) | 1,222.42 mi (1,967.30 km) |
| Gaithersburg to Clemmons (North Carolina) | 275.89 mi (444.01 km) |
