| Iowa City to Redon | 4,163.45 mi (6,700.42 km) |
| Iowa City to Reims | 4,342.46 mi (6,988.52 km) |
| Iowa City to Rennes | 4,163.30 mi (6,700.18 km) |
| Iowa City to Revel | 4,486.18 mi (7,219.81 km) |
| Iowa City to Reze | 4,200.42 mi (6,759.93 km) |
| Iowa City to Riedisheim | 4,527.42 mi (7,286.17 km) |
| Iowa City to Rillieux-la-Pape | 4,509.59 mi (7,257.48 km) |
| Iowa City to Riom | 4,436.09 mi (7,139.19 km) |
| Iowa City to Riorges | 4,467.03 mi (7,188.99 km) |
| Iowa City to Ris-Orangis | 4,303.77 mi (6,926.25 km) |
| Iowa City to Rive-de-Gier | 4,510.10 mi (7,258.30 km) |
| Iowa City to Rivesaltes | 4,549.43 mi (7,321.60 km) |
| Iowa City to Rixheim | 4,528.82 mi (7,288.43 km) |
| Iowa City to Roanne | 4,468.39 mi (7,191.18 km) |
| Iowa City to Roche-la-Moliere | 4,502.26 mi (7,245.69 km) |
