| Gaithersburg to Oxford (Alabama) | 614.57 mi (989.05 km) |
| Gaithersburg to Oxford (Mississippi) | 756.70 mi (1,217.79 km) |
| Gaithersburg to Oxford (Ohio) | 403.27 mi (649.00 km) |
| Gaithersburg to Oxnard (California) | 2,330.00 mi (3,749.78 km) |
| Gaithersburg to Oxon Hill (Maryland) | 27.18 mi (43.75 km) |
| Gaithersburg to Ozark (Alabama) | 712.11 mi (1,146.04 km) |
| Gaithersburg to Ozark (Missouri) | 881.06 mi (1,417.93 km) |
| Gaithersburg to Pace (Florida) | 814.13 mi (1,310.22 km) |
| Gaithersburg to Pacific Grove (California) | 2,420.06 mi (3,894.71 km) |
| Gaithersburg to Pacifica (California) | 2,428.54 mi (3,908.35 km) |
| Gaithersburg to Paducah (Kentucky) | 637.16 mi (1,025.42 km) |
| Gaithersburg to Pahrump (Nevada) | 2,114.28 mi (3,402.60 km) |
| Gaithersburg to Painesville (Ohio) | 277.73 mi (446.97 km) |
| Gaithersburg to Palatine (Illinois) | 603.64 mi (971.46 km) |
| Gaithersburg to Palatka (Florida) | 702.66 mi (1,130.82 km) |
