| Detroit to Octeville | 3,746.56 mi (6,029.51 km) |
| Detroit to Oignies | 3,903.84 mi (6,282.62 km) |
| Detroit to Oissel | 3,865.10 mi (6,220.27 km) |
| Detroit to Olivet | 3,945.87 mi (6,350.27 km) |
| Detroit to Ollioules | 4,277.79 mi (6,884.43 km) |
| Detroit to Olonne-sur-Mer | 3,837.31 mi (6,175.56 km) |
| Detroit to Oloron-Sainte-Marie | 3,998.98 mi (6,435.73 km) |
| Detroit to Onet Village | 4,095.24 mi (6,590.65 km) |
| Detroit to Onnaing | 3,929.96 mi (6,324.66 km) |
| Detroit to Orange | 4,196.86 mi (6,754.20 km) |
| Detroit to Orchies | 3,913.39 mi (6,298.00 km) |
| Detroit to Orleans | 3,944.93 mi (6,348.75 km) |
| Detroit to Orly | 3,936.54 mi (6,335.25 km) |
| Detroit to Ormesson-sur-Marne | 3,940.97 mi (6,342.38 km) |
| Detroit to Orsay | 3,929.83 mi (6,324.44 km) |
