| Mason City to Norton Shores (Michigan) | 350.10 mi (563.42 km) |
| Mason City to Norwalk (California) | 1,481.28 mi (2,383.89 km) |
| Mason City to Norwalk (Connecticut) | 1,020.70 mi (1,642.65 km) |
| Mason City to Norwalk (Iowa) | 117.36 mi (188.87 km) |
| Mason City to Norwalk (Ohio) | 557.44 mi (897.11 km) |
| Mason City to Norwich (Connecticut) | 1,080.79 mi (1,739.36 km) |
| Mason City to Norwood (Ohio) | 531.52 mi (855.39 km) |
| Mason City to Novato (California) | 1,570.17 mi (2,526.95 km) |
| Mason City to Novi (Michigan) | 494.06 mi (795.11 km) |
| Mason City to O'Fallon (Illinois) | 358.17 mi (576.42 km) |
| Mason City to O'Fallon (Missouri) | 328.10 mi (528.02 km) |
| Mason City to Oak Creek (Wisconsin) | 268.29 mi (431.77 km) |
| Mason City to Oak Forest (Illinois) | 297.70 mi (479.09 km) |
| Mason City to Oak Grove (Oregon) | 1,456.18 mi (2,343.50 km) |
| Mason City to Oak Grove (South Carolina) | 906.79 mi (1,459.33 km) |
