| Mason City to Sesimbra | 4,218.60 mi (6,789.19 km) |
| Mason City to Setubal | 4,224.77 mi (6,799.11 km) |
| Mason City to Sever do Vouga | 4,163.60 mi (6,700.67 km) |
| Mason City to Silves | 4,297.40 mi (6,916.00 km) |
| Mason City to Sines | 4,248.13 mi (6,836.71 km) |
| Mason City to Sintra | 4,191.98 mi (6,746.34 km) |
| Mason City to Sobrado de Paiva | 4,156.64 mi (6,689.47 km) |
| Mason City to Sobral de Monte Agraco | 4,194.17 mi (6,749.86 km) |
| Mason City to Soure | 4,177.80 mi (6,723.52 km) |
| Mason City to Tabua | 4,192.57 mi (6,747.29 km) |
| Mason City to Tavira | 4,335.79 mi (6,977.78 km) |
| Mason City to Tomar | 4,204.56 mi (6,766.59 km) |
| Mason City to Tondela | 4,184.24 mi (6,733.89 km) |
| Mason City to Torre de Moncorvo | 4,199.64 mi (6,758.66 km) |
| Mason City to Torres Novas | 4,204.51 mi (6,766.50 km) |
