| Opatija to Oignies | 631.55 mi (1,016.39 km) |
| Opatija to Oissel | 676.45 mi (1,088.64 km) |
| Opatija to Olivet | 613.29 mi (987.00 km) |
| Opatija to Ollioules | 444.80 mi (715.83 km) |
| Opatija to Olonne-sur-Mer | 775.44 mi (1,247.95 km) |
| Opatija to Oloron-Sainte-Marie | 751.09 mi (1,208.76 km) |
| Opatija to Onet Village | 576.80 mi (928.27 km) |
| Opatija to Onnaing | 605.76 mi (974.88 km) |
| Opatija to Orange | 472.76 mi (760.84 km) |
| Opatija to Orchies | 622.22 mi (1,001.36 km) |
| Opatija to Orleans | 613.47 mi (987.28 km) |
| Opatija to Orly | 607.35 mi (977.43 km) |
| Opatija to Ormesson-sur-Marne | 601.99 mi (968.82 km) |
| Opatija to Orsay | 615.27 mi (990.18 km) |
| Opatija to Orthez | 753.52 mi (1,212.68 km) |
