| Sinop to Octeville | 1,827.19 mi (2,940.58 km) |
| Sinop to Oignies | 1,627.96 mi (2,619.95 km) |
| Sinop to Oissel | 1,703.51 mi (2,741.53 km) |
| Sinop to Olivet | 1,661.37 mi (2,673.71 km) |
| Sinop to Ollioules | 1,485.17 mi (2,390.15 km) |
| Sinop to Olonne-sur-Mer | 1,835.56 mi (2,954.05 km) |
| Sinop to Oloron-Sainte-Marie | 1,806.22 mi (2,906.83 km) |
| Sinop to Onet Village | 1,637.00 mi (2,634.50 km) |
| Sinop to Onnaing | 1,600.81 mi (2,576.26 km) |
| Sinop to Orange | 1,529.34 mi (2,461.24 km) |
| Sinop to Orchies | 1,617.12 mi (2,602.51 km) |
| Sinop to Orleans | 1,661.06 mi (2,673.21 km) |
| Sinop to Orly | 1,641.75 mi (2,642.15 km) |
| Sinop to Ormesson-sur-Marne | 1,635.35 mi (2,631.85 km) |
| Sinop to Orsay | 1,650.88 mi (2,656.83 km) |
