| Thornton to Friendswood (Texas) | 4,728.95 mi (7,610.51 km) |
| Thornton to Frisco (Texas) | 4,596.09 mi (7,396.69 km) |
| Thornton to Front Royal (Virginia) | 3,593.43 mi (5,783.07 km) |
| Thornton to Fruit Cove (Florida) | 4,166.55 mi (6,705.41 km) |
| Thornton to Fruita (Colorado) | 4,690.49 mi (7,548.61 km) |
| Thornton to Fruitville (Florida) | 4,343.56 mi (6,990.29 km) |
| Thornton to Fuller Heights (Florida) | 4,294.18 mi (6,910.82 km) |
| Thornton to Fullerton (California) | 5,282.36 mi (8,501.13 km) |
| Thornton to Fullerton (Pennsylvania) | 3,408.14 mi (5,484.87 km) |
| Thornton to Fulshear (Texas) | 4,745.18 mi (7,636.62 km) |
| Thornton to Fulton (Missouri) | 4,120.98 mi (6,632.08 km) |
| Thornton to Fulton (New York) | 3,322.96 mi (5,347.78 km) |
| Thornton to Fuquay-Varina (North Carolina) | 3,777.32 mi (6,079.01 km) |
| Thornton to Gadsden (Alabama) | 4,140.70 mi (6,663.82 km) |
| Thornton to Gaffney (South Carolina) | 3,916.63 mi (6,303.21 km) |
