| Iowa City to Rheinbach | 4,397.32 mi (7,076.80 km) |
| Iowa City to Rheinberg | 4,349.34 mi (6,999.59 km) |
| Iowa City to Rheine | 4,350.36 mi (7,001.23 km) |
| Iowa City to Rheinfelden (Baden) | 4,551.01 mi (7,324.15 km) |
| Iowa City to Ribnitz-Damgarten | 4,441.93 mi (7,148.59 km) |
| Iowa City to Richterich | 4,358.39 mi (7,014.15 km) |
| Iowa City to Riedlingen | 4,589.27 mi (7,385.72 km) |
| Iowa City to Riegelsberg | 4,449.54 mi (7,160.84 km) |
| Iowa City to Rielasingen-Worblingen | 4,583.19 mi (7,375.94 km) |
| Iowa City to Riesa | 4,592.43 mi (7,390.81 km) |
| Iowa City to Rietberg | 4,404.29 mi (7,088.03 km) |
| Iowa City to Rinteln | 4,411.41 mi (7,099.48 km) |
| Iowa City to Ritterhude | 4,361.04 mi (7,018.41 km) |
| Iowa City to Rodenbach | 4,491.57 mi (7,228.48 km) |
| Iowa City to Rodental | 4,558.41 mi (7,336.05 km) |
