| Southborough to Fortuna Foothills (Arizona) | 5,421.11 mi (8,724.43 km) |
| Southborough to Foster City (California) | 5,391.37 mi (8,676.57 km) |
| Southborough to Fostoria (Ohio) | 3,843.15 mi (6,184.95 km) |
| Southborough to Fountain (Colorado) | 4,757.93 mi (7,657.15 km) |
| Southborough to Fountain Hills (Arizona) | 5,277.64 mi (8,493.53 km) |
| Southborough to Fountain Inn (South Carolina) | 4,095.10 mi (6,590.43 km) |
| Southborough to Fountain Valley (California) | 5,479.27 mi (8,818.03 km) |
| Southborough to Fountainebleau (Florida) | 4,455.28 mi (7,170.08 km) |
| Southborough to Four Corners (Oregon) | 4,984.33 mi (8,021.50 km) |
| Southborough to Four Corners (Texas) | 4,889.93 mi (7,869.58 km) |
| Southborough to Four Square Mile (Colorado) | 4,713.03 mi (7,584.88 km) |
| Southborough to Fox Crossing (Wisconsin) | 3,898.18 mi (6,273.52 km) |
| Southborough to Fox Lake (Illinois) | 3,969.68 mi (6,388.58 km) |
| Southborough to Framingham (Massachusetts) | 3,312.34 mi (5,330.70 km) |
| Southborough to Franconia (Virginia) | 3,699.60 mi (5,953.92 km) |
