| Ontario to Norton (Ohio) | 2,013.35 mi (3,240.18 km) |
| Ontario to Norton Shores (Michigan) | 1,793.83 mi (2,886.89 km) |
| Ontario to Norwalk (California) | 28.79 mi (46.34 km) |
| Ontario to Norwalk (Connecticut) | 2,441.54 mi (3,929.28 km) |
| Ontario to Norwalk (Iowa) | 1,398.28 mi (2,250.31 km) |
| Ontario to Norwalk (Ohio) | 1,964.00 mi (3,160.76 km) |
| Ontario to Norwich (Connecticut) | 2,508.95 mi (4,037.76 km) |
| Ontario to Norwood (Ohio) | 1,861.96 mi (2,996.53 km) |
| Ontario to Novato (California) | 393.41 mi (633.14 km) |
| Ontario to Novi (Michigan) | 1,925.82 mi (3,099.32 km) |
| Ontario to O'Fallon (Illinois) | 1,567.18 mi (2,522.14 km) |
| Ontario to O'Fallon (Missouri) | 1,524.78 mi (2,453.89 km) |
| Ontario to Oak Creek (Wisconsin) | 1,708.38 mi (2,749.38 km) |
| Ontario to Oak Forest (Illinois) | 1,701.27 mi (2,737.93 km) |
| Ontario to Oak Grove (Oregon) | 829.76 mi (1,335.37 km) |
