| Gary to Octeville | 3,950.75 mi (6,358.12 km) |
| Gary to Oignies | 4,103.66 mi (6,604.20 km) |
| Gary to Oissel | 4,068.16 mi (6,547.06 km) |
| Gary to Olivet | 4,150.94 mi (6,680.29 km) |
| Gary to Ollioules | 4,487.29 mi (7,221.59 km) |
| Gary to Olonne-sur-Mer | 4,046.63 mi (6,512.42 km) |
| Gary to Oloron-Sainte-Marie | 4,212.22 mi (6,778.91 km) |
| Gary to Onet Village | 4,305.13 mi (6,928.43 km) |
| Gary to Onnaing | 4,129.53 mi (6,645.84 km) |
| Gary to Orange | 4,405.68 mi (7,090.26 km) |
| Gary to Orchies | 4,113.04 mi (6,619.30 km) |
| Gary to Orleans | 4,149.93 mi (6,678.66 km) |
| Gary to Orly | 4,139.82 mi (6,662.40 km) |
| Gary to Ormesson-sur-Marne | 4,144.09 mi (6,669.27 km) |
| Gary to Orsay | 4,133.32 mi (6,651.93 km) |
