| Marshalltown to Santarem | 4,229.97 mi (6,807.48 km) |
| Marshalltown to Santiago do Cacem | 4,274.91 mi (6,879.80 km) |
| Marshalltown to Santo Andre | 4,271.37 mi (6,874.11 km) |
| Marshalltown to Santo Tirso | 4,162.73 mi (6,699.26 km) |
| Marshalltown to Sao Bras de Alportel | 4,345.22 mi (6,992.95 km) |
| Marshalltown to Sao Felix da Marinha | 4,166.67 mi (6,705.60 km) |
| Marshalltown to Sao Joao da Madeira | 4,177.59 mi (6,723.18 km) |
| Marshalltown to Sao Joao de Ver | 4,172.77 mi (6,715.42 km) |
| Marshalltown to Sao Mamede de Infesta | 4,161.66 mi (6,697.55 km) |
| Marshalltown to Sao Pedro do Sul | 4,201.70 mi (6,761.99 km) |
| Marshalltown to Satao | 4,217.09 mi (6,786.76 km) |
| Marshalltown to Seia | 4,229.96 mi (6,807.46 km) |
| Marshalltown to Senhora da Hora | 4,159.91 mi (6,694.73 km) |
| Marshalltown to Serpa | 4,327.76 mi (6,964.85 km) |
| Marshalltown to Serta | 4,235.29 mi (6,816.04 km) |
