| Milwaukee to Octeville | 3,910.41 mi (6,293.20 km) |
| Milwaukee to Oignies | 4,058.90 mi (6,532.17 km) |
| Milwaukee to Oissel | 4,026.56 mi (6,480.12 km) |
| Milwaukee to Olivet | 4,111.35 mi (6,616.58 km) |
| Milwaukee to Ollioules | 4,452.49 mi (7,165.59 km) |
| Milwaukee to Olonne-sur-Mer | 4,011.94 mi (6,456.60 km) |
| Milwaukee to Oloron-Sainte-Marie | 4,182.54 mi (6,731.16 km) |
| Milwaukee to Onet Village | 4,270.94 mi (6,873.41 km) |
| Milwaukee to Onnaing | 4,084.53 mi (6,573.41 km) |
| Milwaukee to Orange | 4,370.12 mi (7,033.03 km) |
| Milwaukee to Orchies | 4,068.11 mi (6,546.99 km) |
| Milwaukee to Orleans | 4,110.26 mi (6,614.83 km) |
| Milwaukee to Orly | 4,098.39 mi (6,595.72 km) |
| Milwaukee to Ormesson-sur-Marne | 4,102.49 mi (6,602.32 km) |
| Milwaukee to Orsay | 4,092.10 mi (6,585.60 km) |
