| Mason City to Sesena | 4,390.96 mi (7,066.56 km) |
| Mason City to Sestao | 4,293.41 mi (6,909.58 km) |
| Mason City to Sevilla | 4,405.37 mi (7,089.75 km) |
| Mason City to Sevilla La Nueva | 4,366.99 mi (7,027.99 km) |
| Mason City to Silla | 4,562.11 mi (7,342.01 km) |
| Mason City to Silleda | 4,095.89 mi (6,591.70 km) |
| Mason City to Sitges | 4,576.67 mi (7,365.44 km) |
| Mason City to Socuellamos | 4,462.67 mi (7,181.98 km) |
| Mason City to Soller | 4,676.06 mi (7,525.40 km) |
| Mason City to Solsona | 4,533.10 mi (7,295.33 km) |
| Mason City to Son Servera | 4,709.80 mi (7,579.69 km) |
| Mason City to Sonseca | 4,396.26 mi (7,075.09 km) |
| Mason City to Sopelana | 4,291.75 mi (6,906.91 km) |
| Mason City to Soria | 4,376.88 mi (7,043.91 km) |
| Mason City to Suances | 4,245.24 mi (6,832.05 km) |
