| Iowa City to Sudbury | 4,118.38 mi (6,627.89 km) |
| Iowa City to Sunbury | 4,096.91 mi (6,593.34 km) |
| Iowa City to Sunderland | 3,947.42 mi (6,352.77 km) |
| Iowa City to Sunninghill | 4,088.96 mi (6,580.54 km) |
| Iowa City to Surbiton | 4,102.28 mi (6,601.99 km) |
| Iowa City to Sutton | 4,107.40 mi (6,610.22 km) |
| Iowa City to Sutton Coldfield | 4,006.74 mi (6,448.22 km) |
| Iowa City to Sutton in Ashfield | 4,008.99 mi (6,451.84 km) |
| Iowa City to Sutton on Hull | 4,022.07 mi (6,472.90 km) |
| Iowa City to Swadlincote | 4,009.62 mi (6,452.86 km) |
| Iowa City to Swallownest | 3,998.91 mi (6,435.62 km) |
| Iowa City to Swanage | 4,066.44 mi (6,544.30 km) |
| Iowa City to Swindon | 4,041.38 mi (6,503.98 km) |
| Iowa City to Swinton | 3,995.20 mi (6,429.66 km) |
| Iowa City to Swinton | 3,957.07 mi (6,368.29 km) |
