| Gaithersburg to Pittsburg (Kansas) | 954.37 mi (1,535.91 km) |
| Gaithersburg to Pittsburgh (Pennsylvania) | 172.19 mi (277.11 km) |
| Gaithersburg to Pittsfield (Massachusetts) | 308.59 mi (496.63 km) |
| Gaithersburg to Placentia (California) | 2,266.96 mi (3,648.32 km) |
| Gaithersburg to Placerville (California) | 2,319.65 mi (3,733.12 km) |
| Gaithersburg to Plainfield (Illinois) | 604.04 mi (972.11 km) |
| Gaithersburg to Plainfield (Indiana) | 490.19 mi (788.89 km) |
| Gaithersburg to Plainfield (New Jersey) | 180.18 mi (289.97 km) |
| Gaithersburg to Plainview (New York) | 228.45 mi (367.66 km) |
| Gaithersburg to Plainview (Texas) | 1,396.03 mi (2,246.70 km) |
| Gaithersburg to Plano (Illinois) | 620.19 mi (998.10 km) |
| Gaithersburg to Plano (Texas) | 1,165.95 mi (1,876.42 km) |
| Gaithersburg to Plant City (Florida) | 818.27 mi (1,316.88 km) |
| Gaithersburg to Plantation (Florida) | 915.99 mi (1,474.14 km) |
| Gaithersburg to Platteville (Wisconsin) | 734.13 mi (1,181.47 km) |
