| Ontario to Pottsville (Pennsylvania) | 2,297.43 mi (3,697.36 km) |
| Ontario to Poughkeepsie (New York) | 2,413.92 mi (3,884.83 km) |
| Ontario to Poulsbo (Washington) | 982.03 mi (1,580.42 km) |
| Ontario to Poway (California) | 80.16 mi (129.01 km) |
| Ontario to Powder Springs (Georgia) | 1,878.64 mi (3,023.38 km) |
| Ontario to Powell (Ohio) | 1,936.11 mi (3,115.86 km) |
| Ontario to Powell (Tennessee) | 1,895.14 mi (3,049.93 km) |
| Ontario to Prairie Ridge (Washington) | 935.74 mi (1,505.92 km) |
| Ontario to Prairie Village (Kansas) | 1,316.63 mi (2,118.90 km) |
| Ontario to Prairieville (Louisiana) | 1,574.99 mi (2,534.70 km) |
| Ontario to Prattville (Alabama) | 1,796.25 mi (2,890.79 km) |
| Ontario to Preakness (New Jersey) | 2,400.38 mi (3,863.04 km) |
| Ontario to Prescott (Arizona) | 296.80 mi (477.65 km) |
| Ontario to Prescott Valley (Arizona) | 304.18 mi (489.53 km) |
| Ontario to Prichard (Alabama) | 1,728.18 mi (2,781.24 km) |
