| Iowa City to Santarem | 4,179.90 mi (6,726.91 km) |
| Iowa City to Santiago do Cacem | 4,223.69 mi (6,797.37 km) |
| Iowa City to Santo Andre | 4,220.16 mi (6,791.69 km) |
| Iowa City to Santo Tirso | 4,114.82 mi (6,622.17 km) |
| Iowa City to Sao Bras de Alportel | 4,293.58 mi (6,909.86 km) |
| Iowa City to Sao Felix da Marinha | 4,118.39 mi (6,627.91 km) |
| Iowa City to Sao Joao da Madeira | 4,129.24 mi (6,645.37 km) |
| Iowa City to Sao Joao de Ver | 4,124.44 mi (6,637.65 km) |
| Iowa City to Sao Mamede de Infesta | 4,113.57 mi (6,620.14 km) |
| Iowa City to Sao Pedro do Sul | 4,153.40 mi (6,684.25 km) |
| Iowa City to Satao | 4,168.93 mi (6,709.24 km) |
| Iowa City to Seia | 4,181.50 mi (6,729.48 km) |
| Iowa City to Senhora da Hora | 4,111.78 mi (6,617.27 km) |
| Iowa City to Serpa | 4,276.99 mi (6,883.14 km) |
| Iowa City to Serta | 4,186.04 mi (6,736.78 km) |
