| Mason City to Roy (Utah) | 972.88 mi (1,565.70 km) |
| Mason City to Royal Kunia (Hawaii) | 3,967.39 mi (6,384.90 km) |
| Mason City to Royal Oak (Michigan) | 510.65 mi (821.82 km) |
| Mason City to Royal Palm Beach (Florida) | 1,349.59 mi (2,171.95 km) |
| Mason City to Royse City (Texas) | 722.88 mi (1,163.36 km) |
| Mason City to Ruskin (Florida) | 1,225.01 mi (1,971.47 km) |
| Mason City to Russellville (Alabama) | 665.47 mi (1,070.98 km) |
| Mason City to Russellville (Arkansas) | 543.95 mi (875.40 km) |
| Mason City to Ruston (Louisiana) | 734.13 mi (1,181.46 km) |
| Mason City to Rutherford (New Jersey) | 991.51 mi (1,595.68 km) |
| Mason City to Rutland (Vermont) | 1,013.48 mi (1,631.05 km) |
| Mason City to Sabana Grande (Puerto Rico) | 2,311.08 mi (3,719.32 km) |
| Mason City to Sachse (Texas) | 726.56 mi (1,169.29 km) |
| Mason City to Saco (Maine) | 1,139.26 mi (1,833.45 km) |
| Mason City to Sacramento (California) | 1,503.18 mi (2,419.13 km) |
