| Rockville to Fortuna (California) | 2,465.18 mi (3,967.32 km) |
| Rockville to Fortuna Foothills (Arizona) | 2,116.37 mi (3,405.97 km) |
| Rockville to Foster City (California) | 2,422.30 mi (3,898.32 km) |
| Rockville to Fostoria (Ohio) | 360.25 mi (579.77 km) |
| Rockville to Fountain (Colorado) | 1,475.05 mi (2,373.86 km) |
| Rockville to Fountain Hills (Arizona) | 1,949.33 mi (3,137.14 km) |
| Rockville to Fountain Inn (South Carolina) | 411.56 mi (662.34 km) |
| Rockville to Fountain Valley (California) | 2,279.68 mi (3,668.80 km) |
| Rockville to Fountainebleau (Florida) | 938.16 mi (1,509.82 km) |
| Rockville to Four Corners (Oregon) | 2,354.73 mi (3,789.57 km) |
| Rockville to Four Corners (Texas) | 1,235.85 mi (1,988.91 km) |
| Rockville to Four Square Mile (Colorado) | 1,475.71 mi (2,374.93 km) |
| Rockville to Fox Crossing (Wisconsin) | 682.94 mi (1,099.09 km) |
| Rockville to Fox Lake (Illinois) | 621.09 mi (999.55 km) |
| Rockville to Framingham (Massachusetts) | 373.21 mi (600.62 km) |
