| Iowa City to Sestu | 4,952.30 mi (7,969.95 km) |
| Iowa City to Settimo Torinese | 4,649.91 mi (7,483.30 km) |
| Iowa City to Seveso | 4,681.55 mi (7,534.23 km) |
| Iowa City to Sezze | 5,014.73 mi (8,070.43 km) |
| Iowa City to Siano | 5,110.18 mi (8,224.04 km) |
| Iowa City to Siena | 4,866.13 mi (7,831.28 km) |
| Iowa City to Signa | 4,836.83 mi (7,784.13 km) |
| Iowa City to Silea | 4,800.70 mi (7,725.99 km) |
| Iowa City to Silvi Paese | 5,008.00 mi (8,059.60 km) |
| Iowa City to Sinalunga | 4,886.20 mi (7,863.58 km) |
| Iowa City to Siniscola | 4,921.28 mi (7,920.04 km) |
| Iowa City to Sinnai | 4,956.76 mi (7,977.13 km) |
| Iowa City to Siracusa | 5,307.16 mi (8,541.05 km) |
| Iowa City to Solaro | 4,680.69 mi (7,532.85 km) |
| Iowa City to Soliera | 4,788.62 mi (7,706.53 km) |
