| Mason City to Santa Ursula | 4,267.68 mi (6,868.16 km) |
| Mason City to Santander | 4,254.30 mi (6,846.64 km) |
| Mason City to Santany | 4,711.66 mi (7,582.68 km) |
| Mason City to Santiago de Compostela | 4,076.00 mi (6,559.69 km) |
| Mason City to Santiago del Teide | 4,257.16 mi (6,851.24 km) |
| Mason City to Santiponce | 4,395.13 mi (7,073.28 km) |
| Mason City to Santomera | 4,588.99 mi (7,385.27 km) |
| Mason City to Santona | 4,269.58 mi (6,871.22 km) |
| Mason City to Santurce-Antiguo | 4,291.58 mi (6,906.64 km) |
| Mason City to Sarria | 4,127.77 mi (6,643.01 km) |
| Mason City to Sauzal | 4,268.19 mi (6,868.98 km) |
| Mason City to Sedavi | 4,560.47 mi (7,339.37 km) |
| Mason City to Segorbe | 4,538.36 mi (7,303.79 km) |
| Mason City to Segovia | 4,339.31 mi (6,983.44 km) |
| Mason City to Senmanat | 4,574.58 mi (7,362.07 km) |
