| Herndon to Fortuna (California) | 2,455.76 mi (3,952.16 km) |
| Herndon to Fortuna Foothills (Arizona) | 2,103.90 mi (3,385.89 km) |
| Herndon to Foster City (California) | 2,411.81 mi (3,881.43 km) |
| Herndon to Fostoria (Ohio) | 352.61 mi (567.47 km) |
| Herndon to Fountain (Colorado) | 1,463.81 mi (2,355.77 km) |
| Herndon to Fountain Hills (Arizona) | 1,936.87 mi (3,117.09 km) |
| Herndon to Fountain Inn (South Carolina) | 397.30 mi (639.39 km) |
| Herndon to Fountain Valley (California) | 2,267.78 mi (3,649.64 km) |
| Herndon to Fountainebleau (Florida) | 927.92 mi (1,493.34 km) |
| Herndon to Four Corners (Oregon) | 2,346.81 mi (3,776.82 km) |
| Herndon to Four Corners (Texas) | 1,221.24 mi (1,965.40 km) |
| Herndon to Four Square Mile (Colorado) | 1,464.94 mi (2,357.59 km) |
| Herndon to Fox Crossing (Wisconsin) | 677.38 mi (1,090.13 km) |
| Herndon to Fox Lake (Illinois) | 613.33 mi (987.06 km) |
| Herndon to Framingham (Massachusetts) | 387.81 mi (624.13 km) |
