| Ontario to University Place (Washington) | 945.96 mi (1,522.37 km) |
| Ontario to Upland (California) | 6.24 mi (10.05 km) |
| Ontario to Upper Arlington (Ohio) | 1,936.53 mi (3,116.54 km) |
| Ontario to Upper Grand Lagoon (Florida) | 1,876.47 mi (3,019.88 km) |
| Ontario to Upper Montclair (New Jersey) | 2,401.95 mi (3,865.56 km) |
| Ontario to Urbana (Illinois) | 1,666.23 mi (2,681.54 km) |
| Ontario to Urbana (Maryland) | 2,241.97 mi (3,608.09 km) |
| Ontario to Urbana (Ohio) | 1,900.55 mi (3,058.63 km) |
| Ontario to Urbandale (Iowa) | 1,396.27 mi (2,247.09 km) |
| Ontario to Utica (New York) | 2,346.50 mi (3,776.33 km) |
| Ontario to Uvalde (Texas) | 1,098.80 mi (1,768.34 km) |
| Ontario to Vacaville (California) | 384.84 mi (619.35 km) |
| Ontario to Vadnais Heights (Minnesota) | 1,503.64 mi (2,419.88 km) |
| Ontario to Vail (Arizona) | 423.89 mi (682.18 km) |
| Ontario to Valdosta (Georgia) | 2,004.33 mi (3,225.66 km) |
