| Iowa City to Sesimbra | 4,189.66 mi (6,742.61 km) |
| Iowa City to Setubal | 4,196.24 mi (6,753.19 km) |
| Iowa City to Sever do Vouga | 4,140.54 mi (6,663.56 km) |
| Iowa City to Silves | 4,266.48 mi (6,866.23 km) |
| Iowa City to Sines | 4,218.39 mi (6,788.84 km) |
| Iowa City to Sintra | 4,163.50 mi (6,700.51 km) |
| Iowa City to Sobrado de Paiva | 4,134.36 mi (6,653.62 km) |
| Iowa City to Sobral de Monte Agraco | 4,166.43 mi (6,705.22 km) |
| Iowa City to Soure | 4,152.92 mi (6,683.48 km) |
| Iowa City to Tabua | 4,169.04 mi (6,709.42 km) |
| Iowa City to Tavira | 4,305.62 mi (6,929.23 km) |
| Iowa City to Tomar | 4,178.92 mi (6,725.32 km) |
| Iowa City to Tondela | 4,161.00 mi (6,696.48 km) |
| Iowa City to Torre de Moncorvo | 4,178.94 mi (6,725.35 km) |
| Iowa City to Torres Novas | 4,178.44 mi (6,724.55 km) |
