| Gaithersburg to Port Chester (New York) | 227.65 mi (366.37 km) |
| Gaithersburg to Port Hueneme (California) | 2,332.04 mi (3,753.05 km) |
| Gaithersburg to Port Huron (Michigan) | 380.37 mi (612.14 km) |
| Gaithersburg to Port Lavaca (Texas) | 1,325.29 mi (2,132.85 km) |
| Gaithersburg to Port Neches (Texas) | 1,140.27 mi (1,835.09 km) |
| Gaithersburg to Port Orange (Florida) | 725.84 mi (1,168.13 km) |
| Gaithersburg to Port Orchard (Washington) | 2,321.16 mi (3,735.54 km) |
| Gaithersburg to Port Royal (South Carolina) | 507.50 mi (816.74 km) |
| Gaithersburg to Port Salerno (Florida) | 845.89 mi (1,361.32 km) |
| Gaithersburg to Port St. John (Florida) | 764.68 mi (1,230.63 km) |
| Gaithersburg to Port St. Lucie (Florida) | 839.25 mi (1,350.65 km) |
| Gaithersburg to Port Washington (New York) | 220.72 mi (355.21 km) |
| Gaithersburg to Port Washington (Wisconsin) | 626.61 mi (1,008.44 km) |
| Gaithersburg to Port Wentworth (Georgia) | 528.96 mi (851.28 km) |
| Gaithersburg to Portage (Indiana) | 550.99 mi (886.73 km) |
