| Council Bluffs to Orbetello | 5,086.81 mi (8,186.43 km) |
| Council Bluffs to Oria | 5,420.36 mi (8,723.23 km) |
| Council Bluffs to Oristano | 5,099.05 mi (8,206.13 km) |
| Council Bluffs to Orta Nova | 5,308.65 mi (8,543.44 km) |
| Council Bluffs to Orte | 5,130.46 mi (8,256.68 km) |
| Council Bluffs to Ortona | 5,211.20 mi (8,386.61 km) |
| Council Bluffs to Orvieto | 5,108.11 mi (8,220.71 km) |
| Council Bluffs to Orzinuovi | 4,905.01 mi (7,893.85 km) |
| Council Bluffs to Osimo | 5,123.95 mi (8,246.19 km) |
| Council Bluffs to Ospitaletto | 4,903.29 mi (7,891.08 km) |
| Council Bluffs to Ostuni | 5,407.07 mi (8,701.84 km) |
| Council Bluffs to Ottaviano | 5,285.27 mi (8,505.81 km) |
| Council Bluffs to Ovada | 4,890.38 mi (7,870.30 km) |
| Council Bluffs to Ozieri | 5,084.91 mi (8,183.37 km) |
| Council Bluffs to Paceco | 5,346.08 mi (8,603.69 km) |
