| Wauwatosa to Octeville | 3,913.15 mi (6,297.61 km) |
| Wauwatosa to Oignies | 4,061.54 mi (6,536.42 km) |
| Wauwatosa to Oissel | 4,029.27 mi (6,484.49 km) |
| Wauwatosa to Olivet | 4,114.10 mi (6,621.01 km) |
| Wauwatosa to Ollioules | 4,455.33 mi (7,170.17 km) |
| Wauwatosa to Olonne-sur-Mer | 4,014.79 mi (6,461.18 km) |
| Wauwatosa to Oloron-Sainte-Marie | 4,185.48 mi (6,735.88 km) |
| Wauwatosa to Onet Village | 4,273.79 mi (6,878.01 km) |
| Wauwatosa to Onnaing | 4,087.16 mi (6,577.66 km) |
| Wauwatosa to Orange | 4,372.95 mi (7,037.59 km) |
| Wauwatosa to Orchies | 4,070.75 mi (6,551.24 km) |
| Wauwatosa to Orleans | 4,113.02 mi (6,619.26 km) |
| Wauwatosa to Orly | 4,101.10 mi (6,600.09 km) |
| Wauwatosa to Ormesson-sur-Marne | 4,105.20 mi (6,606.68 km) |
| Wauwatosa to Orsay | 4,094.82 mi (6,589.98 km) |
