| Mason City to Somersworth (New Hampshire) | 1,120.54 mi (1,803.34 km) |
| Mason City to Somerton (Arizona) | 1,374.41 mi (2,211.89 km) |
| Mason City to Somerville (Massachusetts) | 1,118.81 mi (1,800.55 km) |
| Mason City to Somerville (New Jersey) | 971.00 mi (1,562.68 km) |
| Mason City to Sonoma (California) | 1,560.13 mi (2,510.78 km) |
| Mason City to Soquel (California) | 1,569.63 mi (2,526.07 km) |
| Mason City to South Bend (Indiana) | 367.73 mi (591.80 km) |
| Mason City to South Bradenton (Florida) | 1,235.83 mi (1,988.88 km) |
| Mason City to South Burlington (Vermont) | 997.88 mi (1,605.94 km) |
| Mason City to South Charleston (West Virginia) | 685.90 mi (1,103.84 km) |
| Mason City to South Daytona (Florida) | 1,178.80 mi (1,897.09 km) |
| Mason City to South El Monte (California) | 1,474.30 mi (2,372.66 km) |
| Mason City to South Elgin (Illinois) | 261.14 mi (420.27 km) |
| Mason City to South Euclid (Ohio) | 606.24 mi (975.66 km) |
| Mason City to South Farmingdale (New York) | 1,026.60 mi (1,652.15 km) |
