| Opava to Oignies | 659.32 mi (1,061.08 km) |
| Opava to Oissel | 751.82 mi (1,209.94 km) |
| Opava to Olivet | 739.36 mi (1,189.89 km) |
| Opava to Ollioules | 739.42 mi (1,189.98 km) |
| Opava to Olonne-sur-Mer | 932.53 mi (1,500.75 km) |
| Opava to Oloron-Sainte-Marie | 991.41 mi (1,595.53 km) |
| Opava to Onet Village | 813.83 mi (1,309.73 km) |
| Opava to Onnaing | 633.00 mi (1,018.72 km) |
| Opava to Orange | 733.79 mi (1,180.92 km) |
| Opava to Orchies | 648.30 mi (1,043.33 km) |
| Opava to Orleans | 738.21 mi (1,188.03 km) |
| Opava to Orly | 701.88 mi (1,129.56 km) |
| Opava to Ormesson-sur-Marne | 694.78 mi (1,118.14 km) |
| Opava to Orsay | 711.70 mi (1,145.37 km) |
| Opava to Orthez | 986.93 mi (1,588.31 km) |
