| Ontario to Friendly (Maryland) | 2,264.94 mi (3,645.06 km) |
| Ontario to Friendswood (Texas) | 1,349.88 mi (2,172.42 km) |
| Ontario to Frisco (Texas) | 1,195.69 mi (1,924.27 km) |
| Ontario to Front Royal (Virginia) | 2,198.66 mi (3,538.39 km) |
| Ontario to Fruit Cove (Florida) | 2,113.85 mi (3,401.91 km) |
| Ontario to Fruita (Colorado) | 605.59 mi (974.61 km) |
| Ontario to Fruitville (Florida) | 2,128.08 mi (3,424.81 km) |
| Ontario to Fuller Heights (Florida) | 2,140.11 mi (3,444.18 km) |
| Ontario to Fullerton (California) | 21.32 mi (34.31 km) |
| Ontario to Fullerton (Pennsylvania) | 2,335.57 mi (3,758.74 km) |
| Ontario to Fulshear (Texas) | 1,307.03 mi (2,103.46 km) |
| Ontario to Fulton (Missouri) | 1,458.98 mi (2,348.01 km) |
| Ontario to Fulton (New York) | 2,286.98 mi (3,680.54 km) |
| Ontario to Fuquay-Varina (North Carolina) | 2,190.84 mi (3,525.81 km) |
| Ontario to Gadsden (Alabama) | 1,801.72 mi (2,899.59 km) |
