| Great Neck to Octeville | 3,424.43 mi (5,511.09 km) |
| Great Neck to Oignies | 3,598.08 mi (5,790.56 km) |
| Great Neck to Oissel | 3,546.60 mi (5,707.70 km) |
| Great Neck to Olivet | 3,618.32 mi (5,823.13 km) |
| Great Neck to Ollioules | 3,928.50 mi (6,322.32 km) |
| Great Neck to Olonne-sur-Mer | 3,491.99 mi (5,619.82 km) |
| Great Neck to Oloron-Sainte-Marie | 3,633.91 mi (5,848.22 km) |
| Great Neck to Onet Village | 3,745.44 mi (6,027.70 km) |
| Great Neck to Onnaing | 3,624.93 mi (5,833.76 km) |
| Great Neck to Orange | 3,851.16 mi (6,197.85 km) |
| Great Neck to Orchies | 3,608.23 mi (5,806.89 km) |
| Great Neck to Orleans | 3,617.68 mi (5,822.09 km) |
| Great Neck to Orly | 3,616.51 mi (5,820.20 km) |
| Great Neck to Ormesson-sur-Marne | 3,621.58 mi (5,828.37 km) |
| Great Neck to Orsay | 3,608.99 mi (5,808.11 km) |
