| Mason City to Sinop | 5,735.90 mi (9,231.03 km) |
| Mason City to Siran | 5,956.76 mi (9,586.48 km) |
| Mason City to Sirnak | 6,207.84 mi (9,990.56 km) |
| Mason City to Sirvan | 6,163.54 mi (9,919.25 km) |
| Mason City to Sivas | 5,920.70 mi (9,528.45 km) |
| Mason City to Sivasli | 5,760.10 mi (9,269.99 km) |
| Mason City to Siverek | 6,104.21 mi (9,823.77 km) |
| Mason City to Sivrice | 6,063.49 mi (9,758.24 km) |
| Mason City to Sivrihisar | 5,767.98 mi (9,282.66 km) |
| Mason City to Sogut | 5,692.92 mi (9,161.88 km) |
| Mason City to Sogutlu | 5,654.60 mi (9,100.20 km) |
| Mason City to Soke | 5,722.40 mi (9,209.31 km) |
| Mason City to Solhan | 6,082.78 mi (9,789.29 km) |
| Mason City to Soma | 5,652.31 mi (9,096.51 km) |
| Mason City to Sorgun | 5,862.10 mi (9,434.14 km) |
