| Iowa City to Smyrna (Delaware) | 851.31 mi (1,370.05 km) |
| Iowa City to Smyrna (Georgia) | 660.27 mi (1,062.61 km) |
| Iowa City to Smyrna (Tennessee) | 476.22 mi (766.41 km) |
| Iowa City to Snellville (Georgia) | 677.23 mi (1,089.90 km) |
| Iowa City to Snoqualmie (Washington) | 1,534.75 mi (2,469.94 km) |
| Iowa City to Snyder (Texas) | 804.20 mi (1,294.24 km) |
| Iowa City to Socastee (South Carolina) | 877.09 mi (1,411.55 km) |
| Iowa City to Socorro (Texas) | 1,067.70 mi (1,718.30 km) |
| Iowa City to Soddy-Daisy (Tennessee) | 559.77 mi (900.86 km) |
| Iowa City to Solana Beach (California) | 1,527.52 mi (2,458.30 km) |
| Iowa City to Soledad (California) | 1,631.01 mi (2,624.85 km) |
| Iowa City to Solon (Ohio) | 522.01 mi (840.10 km) |
| Iowa City to Somers Point (New Jersey) | 902.36 mi (1,452.21 km) |
| Iowa City to Somerset (Kentucky) | 485.93 mi (782.02 km) |
| Iowa City to Somerset (New Jersey) | 888.97 mi (1,430.66 km) |
