| Gaithersburg to Rancho Cordova (California) | 2,346.16 mi (3,775.78 km) |
| Gaithersburg to Rancho Cucamonga (California) | 2,245.49 mi (3,613.76 km) |
| Gaithersburg to Rancho Mirage (California) | 2,193.47 mi (3,530.04 km) |
| Gaithersburg to Rancho Palos Verdes (California) | 2,297.28 mi (3,697.11 km) |
| Gaithersburg to Rancho San Diego (California) | 2,245.77 mi (3,614.22 km) |
| Gaithersburg to Rancho Santa Margarita (California) | 2,259.50 mi (3,636.32 km) |
| Gaithersburg to Randallstown (Maryland) | 27.43 mi (44.15 km) |
| Gaithersburg to Rantoul (Illinois) | 586.70 mi (944.20 km) |
| Gaithersburg to Rapid City (South Dakota) | 1,379.96 mi (2,220.83 km) |
| Gaithersburg to Ravenna (Ohio) | 254.69 mi (409.88 km) |
| Gaithersburg to Raymondville (Texas) | 1,474.29 mi (2,372.64 km) |
| Gaithersburg to Raymore (Missouri) | 925.29 mi (1,489.11 km) |
| Gaithersburg to Raytown (Missouri) | 924.11 mi (1,487.22 km) |
| Gaithersburg to Reading (Ohio) | 386.66 mi (622.26 km) |
| Gaithersburg to Reading (Pennsylvania) | 107.74 mi (173.39 km) |
