| Iowa City to Nasaud | 5,149.88 mi (8,287.93 km) |
| Iowa City to Navodari | 5,437.62 mi (8,751.00 km) |
| Iowa City to Negresti-Oas | 5,088.89 mi (8,189.78 km) |
| Iowa City to Nehoiu | 5,308.98 mi (8,543.98 km) |
| Iowa City to Ocna Mures | 5,176.03 mi (8,330.02 km) |
| Iowa City to Odobesti | 5,312.83 mi (8,550.18 km) |
| Iowa City to Odorheiu Secuiesc | 5,227.51 mi (8,412.86 km) |
| Iowa City to Oltenita | 5,384.46 mi (8,665.46 km) |
| Iowa City to Onesti | 5,278.13 mi (8,494.32 km) |
| Iowa City to Oradea | 5,077.78 mi (8,171.90 km) |
| Iowa City to Orastie | 5,180.49 mi (8,337.19 km) |
| Iowa City to Oravita | 5,168.13 mi (8,317.30 km) |
| Iowa City to Orsova | 5,208.14 mi (8,381.70 km) |
| Iowa City to Otelu Rosu | 5,167.88 mi (8,316.90 km) |
| Iowa City to Otopeni | 5,341.94 mi (8,597.02 km) |
