| Troy to Octeville | 3,739.91 mi (6,018.80 km) |
| Troy to Oignies | 3,896.65 mi (6,271.05 km) |
| Troy to Oissel | 3,858.30 mi (6,209.33 km) |
| Troy to Olivet | 3,939.35 mi (6,339.76 km) |
| Troy to Ollioules | 4,271.92 mi (6,874.98 km) |
| Troy to Olonne-sur-Mer | 3,831.40 mi (6,166.04 km) |
| Troy to Oloron-Sainte-Marie | 3,993.73 mi (6,427.29 km) |
| Troy to Onet Village | 4,089.42 mi (6,581.29 km) |
| Troy to Onnaing | 3,922.74 mi (6,313.04 km) |
| Troy to Orange | 4,190.88 mi (6,744.58 km) |
| Troy to Orchies | 3,906.18 mi (6,286.39 km) |
| Troy to Orleans | 3,938.39 mi (6,338.23 km) |
| Troy to Orly | 3,929.77 mi (6,324.36 km) |
| Troy to Ormesson-sur-Marne | 3,934.19 mi (6,331.46 km) |
| Troy to Orsay | 3,923.09 mi (6,313.60 km) |
