| Prospect Heights to Fortuna (California) | 1,867.37 mi (3,005.24 km) |
| Prospect Heights to Fortuna Foothills (Arizona) | 1,584.44 mi (2,549.91 km) |
| Prospect Heights to Foster City (California) | 1,836.25 mi (2,955.16 km) |
| Prospect Heights to Fostoria (Ohio) | 242.06 mi (389.56 km) |
| Prospect Heights to Fountain (Colorado) | 911.06 mi (1,466.21 km) |
| Prospect Heights to Fountain Hills (Arizona) | 1,419.26 mi (2,284.08 km) |
| Prospect Heights to Fountain Inn (South Carolina) | 597.90 mi (962.23 km) |
| Prospect Heights to Fountain Valley (California) | 1,725.81 mi (2,777.43 km) |
| Prospect Heights to Fountainebleau (Florida) | 1,207.90 mi (1,943.92 km) |
| Prospect Heights to Four Corners (Oregon) | 1,753.03 mi (2,821.23 km) |
| Prospect Heights to Four Corners (Texas) | 960.92 mi (1,546.46 km) |
| Prospect Heights to Four Square Mile (Colorado) | 900.00 mi (1,448.41 km) |
| Prospect Heights to Fox Crossing (Wisconsin) | 149.00 mi (239.79 km) |
| Prospect Heights to Fox Lake (Illinois) | 25.74 mi (41.42 km) |
| Prospect Heights to Framingham (Massachusetts) | 842.74 mi (1,356.27 km) |
