| Mason City to Santarem | 4,206.65 mi (6,769.95 km) |
| Mason City to Santiago do Cacem | 4,253.11 mi (6,844.72 km) |
| Mason City to Santo Andre | 4,249.57 mi (6,839.02 km) |
| Mason City to Santo Tirso | 4,136.64 mi (6,657.28 km) |
| Mason City to Sao Bras de Alportel | 4,323.95 mi (6,958.73 km) |
| Mason City to Sao Felix da Marinha | 4,141.05 mi (6,664.37 km) |
| Mason City to Sao Joao da Madeira | 4,152.06 mi (6,682.10 km) |
| Mason City to Sao Joao de Ver | 4,147.21 mi (6,674.28 km) |
| Mason City to Sao Mamede de Infesta | 4,135.82 mi (6,655.96 km) |
| Mason City to Sao Pedro do Sul | 4,176.10 mi (6,720.79 km) |
| Mason City to Satao | 4,191.31 mi (6,745.27 km) |
| Mason City to Seia | 4,204.55 mi (6,766.56 km) |
| Mason City to Senhora da Hora | 4,134.12 mi (6,653.22 km) |
| Mason City to Serpa | 4,305.33 mi (6,928.76 km) |
| Mason City to Serta | 4,210.89 mi (6,776.78 km) |
