| Kastav to Oignies | 631.65 mi (1,016.54 km) |
| Kastav to Oissel | 677.15 mi (1,089.77 km) |
| Kastav to Olivet | 614.49 mi (988.92 km) |
| Kastav to Ollioules | 447.92 mi (720.85 km) |
| Kastav to Olonne-sur-Mer | 777.18 mi (1,250.75 km) |
| Kastav to Oloron-Sainte-Marie | 753.76 mi (1,213.06 km) |
| Kastav to Onet Village | 579.30 mi (932.30 km) |
| Kastav to Onnaing | 605.81 mi (974.95 km) |
| Kastav to Orange | 475.47 mi (765.19 km) |
| Kastav to Orchies | 622.28 mi (1,001.46 km) |
| Kastav to Orleans | 614.65 mi (989.18 km) |
| Kastav to Orly | 608.16 mi (978.75 km) |
| Kastav to Ormesson-sur-Marne | 602.78 mi (970.08 km) |
| Kastav to Orsay | 616.12 mi (991.55 km) |
| Kastav to Orthez | 756.12 mi (1,216.86 km) |
