| Ontario to Pell City (Alabama) | 1,792.58 mi (2,884.88 km) |
| Ontario to Pella (Iowa) | 1,435.88 mi (2,310.82 km) |
| Ontario to Pembroke Pines (Florida) | 2,283.92 mi (3,675.62 km) |
| Ontario to Pendleton (Oregon) | 806.54 mi (1,298.01 km) |
| Ontario to Pensacola (Florida) | 1,788.15 mi (2,877.74 km) |
| Ontario to Peoria (Arizona) | 304.81 mi (490.54 km) |
| Ontario to Peoria (Illinois) | 1,597.15 mi (2,570.37 km) |
| Ontario to Perris (California) | 27.92 mi (44.94 km) |
| Ontario to Perry (Georgia) | 1,951.50 mi (3,140.63 km) |
| Ontario to Perry Hall (Maryland) | 2,287.69 mi (3,681.69 km) |
| Ontario to Perrysburg (Ohio) | 1,911.97 mi (3,077.02 km) |
| Ontario to Perth Amboy (New Jersey) | 2,399.44 mi (3,861.52 km) |
| Ontario to Peru (Indiana) | 1,781.32 mi (2,866.76 km) |
| Ontario to Petal (Mississippi) | 1,654.80 mi (2,663.15 km) |
| Ontario to Petaluma (California) | 403.35 mi (649.12 km) |
