| Mason City to Portage (Michigan) | 391.91 mi (630.71 km) |
| Mason City to Portage (Wisconsin) | 189.62 mi (305.16 km) |
| Mason City to Portales (New Mexico) | 826.17 mi (1,329.60 km) |
| Mason City to Porterville (California) | 1,452.68 mi (2,337.86 km) |
| Mason City to Portland (Maine) | 1,147.69 mi (1,847.03 km) |
| Mason City to Portland (Oregon) | 1,456.29 mi (2,343.68 km) |
| Mason City to Portland (Tennessee) | 574.51 mi (924.59 km) |
| Mason City to Portland (Texas) | 1,078.87 mi (1,736.27 km) |
| Mason City to Portsmouth (New Hampshire) | 1,127.49 mi (1,814.52 km) |
| Mason City to Portsmouth (Ohio) | 614.67 mi (989.21 km) |
| Mason City to Portsmouth (Virginia) | 989.83 mi (1,592.97 km) |
| Mason City to Post Falls (Idaho) | 1,188.25 mi (1,912.31 km) |
| Mason City to Potomac (Maryland) | 879.49 mi (1,415.41 km) |
| Mason City to Potomac Park (California) | 1,472.33 mi (2,369.48 km) |
| Mason City to Pottstown (Pennsylvania) | 925.65 mi (1,489.69 km) |
