| Mason City to Oxford (Alabama) | 769.50 mi (1,238.39 km) |
| Mason City to Oxford (Mississippi) | 638.20 mi (1,027.09 km) |
| Mason City to Oxford (Ohio) | 505.40 mi (813.36 km) |
| Mason City to Oxnard (California) | 1,523.79 mi (2,452.30 km) |
| Mason City to Oxon Hill (Maryland) | 896.80 mi (1,443.25 km) |
| Mason City to Ozark (Alabama) | 907.65 mi (1,460.72 km) |
| Mason City to Ozark (Missouri) | 422.31 mi (679.65 km) |
| Mason City to Pace (Florida) | 927.05 mi (1,491.94 km) |
| Mason City to Pacific Grove (California) | 1,579.61 mi (2,542.13 km) |
| Mason City to Pacifica (California) | 1,579.02 mi (2,541.18 km) |
| Mason City to Paducah (Kentucky) | 483.85 mi (778.67 km) |
| Mason City to Pahrump (Nevada) | 1,298.03 mi (2,088.97 km) |
| Mason City to Painesville (Ohio) | 616.52 mi (992.19 km) |
| Mason City to Palatine (Illinois) | 271.58 mi (437.06 km) |
| Mason City to Palatka (Florida) | 1,129.41 mi (1,817.61 km) |
