| Mason City to Superior (Colorado) | 656.42 mi (1,056.40 km) |
| Mason City to Superior (Wisconsin) | 250.98 mi (403.92 km) |
| Mason City to Surprise (Arizona) | 1,225.97 mi (1,973.00 km) |
| Mason City to Susanville (California) | 1,418.41 mi (2,282.71 km) |
| Mason City to Sussex (Wisconsin) | 250.89 mi (403.76 km) |
| Mason City to Suwanee (Georgia) | 797.85 mi (1,284.01 km) |
| Mason City to Swansea (Illinois) | 359.29 mi (578.22 km) |
| Mason City to Sweetwater (Florida) | 1,401.22 mi (2,255.05 km) |
| Mason City to Sweetwater (Texas) | 835.47 mi (1,344.56 km) |
| Mason City to Sycamore (Illinois) | 243.24 mi (391.46 km) |
| Mason City to Sylacauga (Alabama) | 784.61 mi (1,262.71 km) |
| Mason City to Sylvania (Ohio) | 493.81 mi (794.71 km) |
| Mason City to Syosset (New York) | 1,022.00 mi (1,644.75 km) |
| Mason City to Syracuse (New York) | 859.08 mi (1,382.56 km) |
| Mason City to Syracuse (Utah) | 975.43 mi (1,569.81 km) |
