| Katy to Octeville | 4,855.93 mi (7,814.87 km) |
| Katy to Oignies | 5,018.77 mi (8,076.93 km) |
| Katy to Oissel | 4,976.00 mi (8,008.10 km) |
| Katy to Olivet | 5,053.41 mi (8,132.67 km) |
| Katy to Ollioules | 5,374.77 mi (8,649.85 km) |
| Katy to Olonne-sur-Mer | 4,935.98 mi (7,943.68 km) |
| Katy to Oloron-Sainte-Marie | 5,084.99 mi (8,183.49 km) |
| Katy to Onet Village | 5,191.67 mi (8,355.18 km) |
| Katy to Onnaing | 5,045.12 mi (8,119.34 km) |
| Katy to Orange | 5,295.84 mi (8,522.83 km) |
| Katy to Orchies | 5,028.50 mi (8,092.58 km) |
| Katy to Orleans | 5,052.59 mi (8,131.35 km) |
| Katy to Orly | 5,047.00 mi (8,122.37 km) |
| Katy to Ormesson-sur-Marne | 5,051.68 mi (8,129.89 km) |
| Katy to Orsay | 5,039.99 mi (8,111.08 km) |
