| Iowa City to Redondela | 4,074.97 mi (6,558.03 km) |
| Iowa City to Reinosa | 4,244.69 mi (6,831.17 km) |
| Iowa City to Requena | 4,509.75 mi (7,257.75 km) |
| Iowa City to Reus | 4,539.47 mi (7,305.56 km) |
| Iowa City to Rianxo | 4,053.49 mi (6,523.46 km) |
| Iowa City to Ribadeo | 4,100.60 mi (6,599.28 km) |
| Iowa City to Rincon de la Victoria | 4,475.68 mi (7,202.92 km) |
| Iowa City to Ripoll | 4,543.59 mi (7,312.20 km) |
| Iowa City to Ripollet | 4,570.30 mi (7,355.19 km) |
| Iowa City to Rojales | 4,581.81 mi (7,373.72 km) |
| Iowa City to Ronda | 4,434.54 mi (7,136.70 km) |
| Iowa City to Roquetas de Mar | 4,549.74 mi (7,322.10 km) |
| Iowa City to Rosas | 4,582.18 mi (7,374.30 km) |
| Iowa City to Rubi | 4,565.18 mi (7,346.94 km) |
| Iowa City to Rute | 4,448.53 mi (7,159.22 km) |
