| Council Bluffs to Oerlinghausen | 4,576.11 mi (7,364.54 km) |
| Council Bluffs to Oestrich-Winkel | 4,635.69 mi (7,460.42 km) |
| Council Bluffs to Offenburg | 4,698.24 mi (7,561.09 km) |
| Council Bluffs to Oftersheim | 4,683.01 mi (7,536.58 km) |
| Council Bluffs to Ohrdruf | 4,694.74 mi (7,555.45 km) |
| Council Bluffs to Ohringen | 4,722.65 mi (7,600.38 km) |
| Council Bluffs to Olbernhau | 4,789.24 mi (7,707.53 km) |
| Council Bluffs to Olching | 4,830.52 mi (7,773.97 km) |
| Council Bluffs to Oldenburg | 4,512.02 mi (7,261.39 km) |
| Council Bluffs to Oldenburg in Holstein | 4,550.56 mi (7,323.42 km) |
| Council Bluffs to Olfen | 4,542.71 mi (7,310.78 km) |
| Council Bluffs to Olpe | 4,587.25 mi (7,382.47 km) |
| Council Bluffs to Olsberg | 4,595.71 mi (7,396.09 km) |
| Council Bluffs to Oranienburg | 4,692.85 mi (7,552.40 km) |
| Council Bluffs to Ortenberg | 4,657.49 mi (7,495.51 km) |
