| Kocaeli to Octeville | 1,639.26 mi (2,638.13 km) |
| Kocaeli to Oignies | 1,452.63 mi (2,337.78 km) |
| Kocaeli to Oissel | 1,515.01 mi (2,438.18 km) |
| Kocaeli to Olivet | 1,459.79 mi (2,349.31 km) |
| Kocaeli to Ollioules | 1,243.38 mi (2,001.02 km) |
| Kocaeli to Olonne-sur-Mer | 1,621.89 mi (2,610.18 km) |
| Kocaeli to Oloron-Sainte-Marie | 1,568.05 mi (2,523.53 km) |
| Kocaeli to Onet Village | 1,405.79 mi (2,262.40 km) |
| Kocaeli to Onnaing | 1,425.56 mi (2,294.21 km) |
| Kocaeli to Orange | 1,295.83 mi (2,085.44 km) |
| Kocaeli to Orchies | 1,442.22 mi (2,321.03 km) |
| Kocaeli to Orleans | 1,459.84 mi (2,349.39 km) |
| Kocaeli to Orly | 1,448.76 mi (2,331.55 km) |
| Kocaeli to Ormesson-sur-Marne | 1,442.89 mi (2,322.10 km) |
| Kocaeli to Orsay | 1,457.27 mi (2,345.24 km) |
