| Gaithersburg to Ridgeland (Mississippi) | 859.31 mi (1,382.92 km) |
| Gaithersburg to Ridgewood (New Jersey) | 207.77 mi (334.37 km) |
| Gaithersburg to Rifle (Colorado) | 1,625.45 mi (2,615.90 km) |
| Gaithersburg to Rincon (Georgia) | 523.54 mi (842.56 km) |
| Gaithersburg to Ringwood (New Jersey) | 206.52 mi (332.37 km) |
| Gaithersburg to Río Grande (Puerto Rico) | 1,587.75 mi (2,555.23 km) |
| Gaithersburg to Rio Grande City (Texas) | 1,527.34 mi (2,458.02 km) |
| Gaithersburg to Rio Linda (California) | 2,353.97 mi (3,788.34 km) |
| Gaithersburg to Rio Rancho (New Mexico) | 1,636.72 mi (2,634.04 km) |
| Gaithersburg to Rio Rico (Arizona) | 1,963.51 mi (3,159.96 km) |
| Gaithersburg to Ripon (California) | 2,355.35 mi (3,790.58 km) |
| Gaithersburg to River Edge (New Jersey) | 208.64 mi (335.77 km) |
| Gaithersburg to River Falls (Wisconsin) | 882.78 mi (1,420.70 km) |
| Gaithersburg to River Forest (Illinois) | 588.38 mi (946.91 km) |
| Gaithersburg to River Grove (Illinois) | 589.84 mi (949.25 km) |
