| Iowa City to Nyon | 4,539.20 mi (7,305.14 km) |
| Iowa City to Oberriet | 4,627.65 mi (7,447.48 km) |
| Iowa City to Obersiggenthal | 4,572.87 mi (7,359.33 km) |
| Iowa City to Oberwil | 4,544.01 mi (7,312.87 km) |
| Iowa City to Oberwingert | 4,589.52 mi (7,386.11 km) |
| Iowa City to Oftringen | 4,565.70 mi (7,347.78 km) |
| Iowa City to Olten | 4,563.71 mi (7,344.58 km) |
| Iowa City to Onex | 4,542.09 mi (7,309.79 km) |
| Iowa City to Opfikon | 4,585.39 mi (7,379.47 km) |
| Iowa City to Ostermundigen | 4,564.26 mi (7,345.47 km) |
| Iowa City to Payerne | 4,548.64 mi (7,320.34 km) |
| Iowa City to Pfaffikon | 4,596.26 mi (7,396.97 km) |
| Iowa City to Plan-les-Ouates | 4,543.41 mi (7,311.91 km) |
| Iowa City to Pratteln | 4,549.37 mi (7,321.50 km) |
| Iowa City to Prilly | 4,547.31 mi (7,318.19 km) |
