| Gaithersburg to San Diego (California) | 2,254.78 mi (3,628.72 km) |
| Gaithersburg to San Diego Country Estates (California) | 2,232.13 mi (3,592.27 km) |
| Gaithersburg to San Dimas (California) | 2,258.85 mi (3,635.26 km) |
| Gaithersburg to San Fernando (California) | 2,287.94 mi (3,682.09 km) |
| Gaithersburg to San Francisco (California) | 2,423.92 mi (3,900.92 km) |
| Gaithersburg to San Gabriel (California) | 2,274.67 mi (3,660.73 km) |
| Gaithersburg to San Germán (Puerto Rico) | 1,577.23 mi (2,538.31 km) |
| Gaithersburg to San Jacinto (California) | 2,222.84 mi (3,577.32 km) |
| Gaithersburg to San Jose (California) | 2,401.73 mi (3,865.21 km) |
| Gaithersburg to San Juan (Puerto Rico) | 1,580.84 mi (2,544.11 km) |
| Gaithersburg to San Juan (Texas) | 1,504.76 mi (2,421.68 km) |
| Gaithersburg to San Juan Capistrano (California) | 2,265.81 mi (3,646.47 km) |
| Gaithersburg to San Leandro (California) | 2,409.95 mi (3,878.44 km) |
| Gaithersburg to San Lorenzo (California) | 2,409.23 mi (3,877.28 km) |
| Gaithersburg to San Luis (Arizona) | 2,134.60 mi (3,435.30 km) |
