| Ontario to National City (California) | 99.35 mi (159.89 km) |
| Ontario to Naugatuck (Connecticut) | 2,459.39 mi (3,958.00 km) |
| Ontario to Navarre (Florida) | 1,805.80 mi (2,906.16 km) |
| Ontario to Nederland (Texas) | 1,407.98 mi (2,265.92 km) |
| Ontario to Neenah (Wisconsin) | 1,699.67 mi (2,735.36 km) |
| Ontario to Neosho (Missouri) | 1,318.61 mi (2,122.10 km) |
| Ontario to Nesconset (New York) | 2,456.64 mi (3,953.58 km) |
| Ontario to New Albany (Indiana) | 1,788.02 mi (2,877.55 km) |
| Ontario to New Albany (Ohio) | 1,951.71 mi (3,140.97 km) |
| Ontario to New Baltimore (Michigan) | 1,965.29 mi (3,162.83 km) |
| Ontario to New Baltimore (Virginia) | 2,224.65 mi (3,580.23 km) |
| Ontario to New Bedford (Massachusetts) | 2,567.49 mi (4,131.98 km) |
| Ontario to New Berlin (Wisconsin) | 1,698.29 mi (2,733.14 km) |
| Ontario to New Bern (North Carolina) | 2,291.30 mi (3,687.49 km) |
| Ontario to New Braunfels (Texas) | 1,180.31 mi (1,899.52 km) |
