| Rockville to Colton (California) | 2,237.65 mi (3,601.16 km) |
| Rockville to Columbia (Illinois) | 704.26 mi (1,133.40 km) |
| Rockville to Columbia (Maryland) | 17.82 mi (28.67 km) |
| Rockville to Columbia (Missouri) | 813.57 mi (1,309.32 km) |
| Rockville to Columbia (Pennsylvania) | 74.56 mi (120.00 km) |
| Rockville to Columbia (South Carolina) | 405.87 mi (653.18 km) |
| Rockville to Columbia (Tennessee) | 593.17 mi (954.62 km) |
| Rockville to Columbia Heights (Minnesota) | 920.33 mi (1,481.14 km) |
| Rockville to Columbine (Colorado) | 1,486.12 mi (2,391.67 km) |
| Rockville to Columbus (Georgia) | 626.83 mi (1,008.79 km) |
| Rockville to Columbus (Indiana) | 469.46 mi (755.52 km) |
| Rockville to Columbus (Mississippi) | 734.76 mi (1,182.48 km) |
| Rockville to Columbus (Nebraska) | 1,074.95 mi (1,729.96 km) |
| Rockville to Columbus (Ohio) | 316.81 mi (509.86 km) |
| Rockville to Commack (New York) | 238.36 mi (383.61 km) |
