| Iowa City to Rhondda | 3,977.65 mi (6,401.42 km) |
| Iowa City to Rhosllanerchrugog | 3,946.84 mi (6,351.83 km) |
| Iowa City to Rhyl | 3,921.33 mi (6,310.76 km) |
| Iowa City to Rhymney | 3,978.14 mi (6,402.20 km) |
| Iowa City to Richmond | 4,100.38 mi (6,598.93 km) |
| Iowa City to Rickmansworth | 4,087.99 mi (6,578.99 km) |
| Iowa City to Ripley | 4,006.10 mi (6,447.20 km) |
| Iowa City to Ripon | 3,966.72 mi (6,383.81 km) |
| Iowa City to Risca | 3,990.29 mi (6,421.76 km) |
| Iowa City to Rochdale | 3,960.41 mi (6,373.67 km) |
| Iowa City to Rochester | 4,133.07 mi (6,651.54 km) |
| Iowa City to Rock Ferry | 3,937.06 mi (6,336.09 km) |
| Iowa City to Rogerstone | 3,992.27 mi (6,424.94 km) |
| Iowa City to Romford | 4,114.17 mi (6,621.11 km) |
| Iowa City to Romsey | 4,071.24 mi (6,552.03 km) |
