| Iowa City to Red Bank (New Jersey) | 913.48 mi (1,470.11 km) |
| Iowa City to Red Bank (Tennessee) | 563.96 mi (907.60 km) |
| Iowa City to Red Bluff (California) | 1,598.29 mi (2,572.20 km) |
| Iowa City to Red Hill (South Carolina) | 872.77 mi (1,404.59 km) |
| Iowa City to Red Oak (Texas) | 694.10 mi (1,117.04 km) |
| Iowa City to Red Wing (Minnesota) | 209.27 mi (336.79 km) |
| Iowa City to Redan (Georgia) | 678.63 mi (1,092.15 km) |
| Iowa City to Redding (California) | 1,598.31 mi (2,572.24 km) |
| Iowa City to Redland (Maryland) | 775.69 mi (1,248.36 km) |
| Iowa City to Redlands (California) | 1,487.38 mi (2,393.71 km) |
| Iowa City to Redmond (Oregon) | 1,501.80 mi (2,416.91 km) |
| Iowa City to Redmond (Washington) | 1,548.29 mi (2,491.74 km) |
| Iowa City to Redondo Beach (California) | 1,554.58 mi (2,501.86 km) |
| Iowa City to Redwood City (California) | 1,650.59 mi (2,656.37 km) |
| Iowa City to Reedley (California) | 1,529.33 mi (2,461.21 km) |
