| West Allis to Octeville | 3,915.35 mi (6,301.14 km) |
| West Allis to Oignies | 4,063.88 mi (6,540.19 km) |
| West Allis to Oissel | 4,031.51 mi (6,488.09 km) |
| West Allis to Olivet | 4,116.28 mi (6,624.51 km) |
| West Allis to Ollioules | 4,457.36 mi (7,173.43 km) |
| West Allis to Olonne-sur-Mer | 4,016.81 mi (6,464.44 km) |
| West Allis to Oloron-Sainte-Marie | 4,187.34 mi (6,738.88 km) |
| West Allis to Onet Village | 4,275.80 mi (6,881.24 km) |
| West Allis to Onnaing | 4,089.51 mi (6,581.43 km) |
| West Allis to Orange | 4,375.01 mi (7,040.89 km) |
| West Allis to Orchies | 4,073.09 mi (6,555.01 km) |
| West Allis to Orleans | 4,115.20 mi (6,622.77 km) |
| West Allis to Orly | 4,103.34 mi (6,603.69 km) |
| West Allis to Ormesson-sur-Marne | 4,107.44 mi (6,610.29 km) |
| West Allis to Orsay | 4,097.05 mi (6,593.57 km) |
