| Mason City to Selargius | 4,963.11 mi (7,987.35 km) |
| Mason City to Selvazzano Dentro | 4,784.54 mi (7,699.98 km) |
| Mason City to Senago | 4,677.77 mi (7,528.14 km) |
| Mason City to Senigallia | 4,914.06 mi (7,908.42 km) |
| Mason City to Seravezza | 4,789.53 mi (7,708.00 km) |
| Mason City to Seregno | 4,677.31 mi (7,527.41 km) |
| Mason City to Seriate | 4,695.00 mi (7,555.87 km) |
| Mason City to Sermoneta | 5,006.24 mi (8,056.76 km) |
| Mason City to Serramanna | 4,945.81 mi (7,959.51 km) |
| Mason City to Serravalle Pistoiese | 4,816.62 mi (7,751.61 km) |
| Mason City to Sessa Aurunca | 5,057.18 mi (8,138.75 km) |
| Mason City to Sesto Calende | 4,652.54 mi (7,487.54 km) |
| Mason City to Sesto Fiorentino | 4,833.42 mi (7,778.63 km) |
| Mason City to Sesto San Giovanni | 4,683.70 mi (7,537.68 km) |
| Mason City to Sestri Levante | 4,745.57 mi (7,637.25 km) |
