| Gaithersburg to River Ridge (Louisiana) | 972.74 mi (1,565.48 km) |
| Gaithersburg to Riverbank (California) | 2,345.81 mi (3,775.22 km) |
| Gaithersburg to Riverdale (Georgia) | 555.12 mi (893.37 km) |
| Gaithersburg to Riverdale (Illinois) | 574.86 mi (925.14 km) |
| Gaithersburg to Riverside (California) | 2,240.90 mi (3,606.39 km) |
| Gaithersburg to Riverside (Ohio) | 371.17 mi (597.35 km) |
| Gaithersburg to Riverton (Utah) | 1,834.49 mi (2,952.33 km) |
| Gaithersburg to Riverton (Wyoming) | 1,637.39 mi (2,635.12 km) |
| Gaithersburg to Riverview (Florida) | 834.40 mi (1,342.83 km) |
| Gaithersburg to Riverview (Michigan) | 377.16 mi (606.98 km) |
| Gaithersburg to Riviera Beach (Florida) | 869.36 mi (1,399.09 km) |
| Gaithersburg to Riviera Beach (Maryland) | 36.88 mi (59.36 km) |
| Gaithersburg to Roanoke (Virginia) | 196.60 mi (316.39 km) |
| Gaithersburg to Roanoke Rapids (North Carolina) | 187.34 mi (301.49 km) |
| Gaithersburg to Robbinsdale (Minnesota) | 919.22 mi (1,479.34 km) |
