| Gaithersburg to Reidsville (North Carolina) | 235.36 mi (378.78 km) |
| Gaithersburg to Reisterstown (Maryland) | 30.75 mi (49.49 km) |
| Gaithersburg to Rendon (Texas) | 1,205.95 mi (1,940.79 km) |
| Gaithersburg to Reno (Nevada) | 2,256.60 mi (3,631.65 km) |
| Gaithersburg to Renton (Washington) | 2,299.39 mi (3,700.50 km) |
| Gaithersburg to Republic (Missouri) | 891.46 mi (1,434.67 km) |
| Gaithersburg to Reston (Virginia) | 14.63 mi (23.55 km) |
| Gaithersburg to Revere (Massachusetts) | 396.10 mi (637.47 km) |
| Gaithersburg to Rexburg (Idaho) | 1,805.44 mi (2,905.58 km) |
| Gaithersburg to Reynoldsburg (Ohio) | 302.71 mi (487.16 km) |
| Gaithersburg to Rialto (California) | 2,236.17 mi (3,598.77 km) |
| Gaithersburg to Richardson (Texas) | 1,166.37 mi (1,877.09 km) |
| Gaithersburg to Richfield (Minnesota) | 913.31 mi (1,469.83 km) |
| Gaithersburg to Richfield (Wisconsin) | 638.97 mi (1,028.33 km) |
| Gaithersburg to Richland (Washington) | 2,165.88 mi (3,485.64 km) |
