| Istrana to Octeville | 693.92 mi (1,116.76 km) |
| Istrana to Oignies | 534.21 mi (859.73 km) |
| Istrana to Oissel | 571.82 mi (920.26 km) |
| Istrana to Olivet | 505.17 mi (812.99 km) |
| Istrana to Ollioules | 355.02 mi (571.34 km) |
| Istrana to Olonne-sur-Mer | 666.26 mi (1,072.24 km) |
| Istrana to Oloron-Sainte-Marie | 649.22 mi (1,044.83 km) |
| Istrana to Onet Village | 472.79 mi (760.88 km) |
| Istrana to Onnaing | 509.29 mi (819.63 km) |
| Istrana to Orange | 372.20 mi (599.01 km) |
| Istrana to Orchies | 525.42 mi (845.58 km) |
| Istrana to Orleans | 505.42 mi (813.40 km) |
| Istrana to Orly | 501.78 mi (807.54 km) |
| Istrana to Ormesson-sur-Marne | 496.69 mi (799.35 km) |
| Istrana to Orsay | 509.40 mi (819.81 km) |
