| Thornton to Fortuna Foothills (Arizona) | 5,239.58 mi (8,432.29 km) |
| Thornton to Foster City (California) | 5,198.86 mi (8,366.76 km) |
| Thornton to Fostoria (Ohio) | 3,689.17 mi (5,937.14 km) |
| Thornton to Fountain (Colorado) | 4,580.91 mi (7,372.27 km) |
| Thornton to Fountain Hills (Arizona) | 5,098.19 mi (8,204.74 km) |
| Thornton to Fountain Inn (South Carolina) | 3,956.75 mi (6,367.78 km) |
| Thornton to Fountain Valley (California) | 5,293.14 mi (8,518.49 km) |
| Thornton to Fountainebleau (Florida) | 4,339.86 mi (6,984.33 km) |
| Thornton to Four Corners (Oregon) | 4,787.43 mi (7,704.63 km) |
| Thornton to Four Corners (Texas) | 4,737.99 mi (7,625.06 km) |
| Thornton to Four Square Mile (Colorado) | 4,534.62 mi (7,297.77 km) |
| Thornton to Fox Crossing (Wisconsin) | 3,731.66 mi (6,005.53 km) |
| Thornton to Fox Lake (Illinois) | 3,806.80 mi (6,126.45 km) |
| Thornton to Framingham (Massachusetts) | 3,173.70 mi (5,107.57 km) |
| Thornton to Franconia (Virginia) | 3,560.68 mi (5,730.36 km) |
