| Ontario to Pittsburg (Kansas) | 1,302.53 mi (2,096.23 km) |
| Ontario to Pittsburgh (Pennsylvania) | 2,100.02 mi (3,379.66 km) |
| Ontario to Pittsfield (Massachusetts) | 2,446.32 mi (3,936.96 km) |
| Ontario to Placentia (California) | 17.99 mi (28.95 km) |
| Ontario to Placerville (California) | 369.51 mi (594.67 km) |
| Ontario to Plainfield (Illinois) | 1,677.27 mi (2,699.30 km) |
| Ontario to Plainfield (Indiana) | 1,760.73 mi (2,833.63 km) |
| Ontario to Plainfield (New Jersey) | 2,391.55 mi (3,848.83 km) |
| Ontario to Plainview (New York) | 2,440.16 mi (3,927.06 km) |
| Ontario to Plainview (Texas) | 907.69 mi (1,460.79 km) |
| Ontario to Plano (Illinois) | 1,662.33 mi (2,675.27 km) |
| Ontario to Plano (Texas) | 1,200.99 mi (1,932.80 km) |
| Ontario to Plant City (Florida) | 2,130.92 mi (3,429.39 km) |
| Ontario to Plantation (Florida) | 2,285.24 mi (3,677.74 km) |
| Ontario to Platteville (Wisconsin) | 1,578.94 mi (2,541.06 km) |
