| Decin to Oignies | 491.05 mi (790.27 km) |
| Decin to Oissel | 588.85 mi (947.67 km) |
| Decin to Olivet | 588.28 mi (946.74 km) |
| Decin to Ollioules | 657.34 mi (1,057.89 km) |
| Decin to Olonne-sur-Mer | 783.48 mi (1,260.89 km) |
| Decin to Oloron-Sainte-Marie | 869.76 mi (1,399.74 km) |
| Decin to Onet Village | 697.58 mi (1,122.65 km) |
| Decin to Onnaing | 465.34 mi (748.89 km) |
| Decin to Orange | 633.45 mi (1,019.44 km) |
| Decin to Orchies | 480.06 mi (772.58 km) |
| Decin to Orleans | 586.82 mi (944.39 km) |
| Decin to Orly | 544.52 mi (876.32 km) |
| Decin to Ormesson-sur-Marne | 537.31 mi (864.72 km) |
| Decin to Orsay | 554.40 mi (892.22 km) |
| Decin to Orthez | 862.47 mi (1,388.00 km) |
