| Gaithersburg to Friendly (Maryland) | 29.13 mi (46.88 km) |
| Gaithersburg to Friendswood (Texas) | 1,219.27 mi (1,962.23 km) |
| Gaithersburg to Frisco (Texas) | 1,166.47 mi (1,877.25 km) |
| Gaithersburg to Front Royal (Virginia) | 54.06 mi (87.00 km) |
| Gaithersburg to Fruit Cove (Florida) | 672.53 mi (1,082.34 km) |
| Gaithersburg to Fruita (Colorado) | 1,680.25 mi (2,704.10 km) |
| Gaithersburg to Fruitville (Florida) | 869.57 mi (1,399.44 km) |
| Gaithersburg to Fuller Heights (Florida) | 821.88 mi (1,322.68 km) |
| Gaithersburg to Fullerton (California) | 2,270.76 mi (3,654.43 km) |
| Gaithersburg to Fullerton (Pennsylvania) | 138.19 mi (222.40 km) |
| Gaithersburg to Fulshear (Texas) | 1,244.33 mi (2,002.55 km) |
| Gaithersburg to Fulton (Missouri) | 790.78 mi (1,272.64 km) |
| Gaithersburg to Fulton (New York) | 291.93 mi (469.81 km) |
| Gaithersburg to Fuquay-Varina (North Carolina) | 259.19 mi (417.12 km) |
| Gaithersburg to Gadsden (Alabama) | 602.86 mi (970.20 km) |
