| Gaithersburg to Point Pleasant (New Jersey) | 179.52 mi (288.91 km) |
| Gaithersburg to Pomona (California) | 2,257.59 mi (3,633.24 km) |
| Gaithersburg to Pompano Beach (Florida) | 906.60 mi (1,459.04 km) |
| Gaithersburg to Pompton Lakes (New Jersey) | 201.50 mi (324.28 km) |
| Gaithersburg to Pompton Plains (New Jersey) | 199.13 mi (320.47 km) |
| Gaithersburg to Ponca City (Oklahoma) | 1,092.54 mi (1,758.28 km) |
| Gaithersburg to Ponce (Puerto Rico) | 1,591.75 mi (2,561.68 km) |
| Gaithersburg to Pontiac (Illinois) | 616.31 mi (991.85 km) |
| Gaithersburg to Pontiac (Michigan) | 399.37 mi (642.73 km) |
| Gaithersburg to Pooler (Georgia) | 536.06 mi (862.71 km) |
| Gaithersburg to Poplar Bluff (Missouri) | 736.91 mi (1,185.94 km) |
| Gaithersburg to Poquoson (Virginia) | 145.99 mi (234.95 km) |
| Gaithersburg to Port Angeles (Washington) | 2,356.29 mi (3,792.09 km) |
| Gaithersburg to Port Arthur (Texas) | 1,144.55 mi (1,841.97 km) |
| Gaithersburg to Port Charlotte (Florida) | 885.29 mi (1,424.73 km) |
