| Iowa City to Reichenbach/Vogtland | 4,587.58 mi (7,382.99 km) |
| Iowa City to Reinbek | 4,398.69 mi (7,079.01 km) |
| Iowa City to Reinfeld | 4,393.59 mi (7,070.80 km) |
| Iowa City to Reinheim | 4,497.36 mi (7,237.80 km) |
| Iowa City to Reiskirchen | 4,466.26 mi (7,187.75 km) |
| Iowa City to Rellingen | 4,378.61 mi (7,046.68 km) |
| Iowa City to Remagen | 4,409.59 mi (7,096.56 km) |
| Iowa City to Remscheid | 4,384.83 mi (7,056.70 km) |
| Iowa City to Rendsburg | 4,347.98 mi (6,997.39 km) |
| Iowa City to Renningen | 4,544.32 mi (7,313.38 km) |
| Iowa City to Reutlingen | 4,566.29 mi (7,348.74 km) |
| Iowa City to Rhaude | 4,320.37 mi (6,952.97 km) |
| Iowa City to Rheda-Wiedenbruck | 4,397.98 mi (7,077.86 km) |
| Iowa City to Rhede | 4,341.88 mi (6,987.58 km) |
| Iowa City to Rheinau | 4,511.47 mi (7,260.50 km) |
