| Istres to Oignies | 489.55 mi (787.86 km) |
| Istres to Oissel | 443.18 mi (713.23 km) |
| Istres to Olivet | 335.36 mi (539.70 km) |
| Istres to Ollioules | 50.31 mi (80.96 km) |
| Istres to Olonne-sur-Mer | 390.46 mi (628.38 km) |
| Istres to Oloron-Sainte-Marie | 281.97 mi (453.78 km) |
| Istres to Onet Village | 132.89 mi (213.87 km) |
| Istres to Onnaing | 479.35 mi (771.43 km) |
| Istres to Orange | 43.98 mi (70.78 km) |
| Istres to Orchies | 487.81 mi (785.05 km) |
| Istres to Orleans | 337.55 mi (543.23 km) |
| Istres to Orly | 382.01 mi (614.79 km) |
| Istres to Ormesson-sur-Marne | 382.55 mi (615.65 km) |
| Istres to Orsay | 382.37 mi (615.36 km) |
| Istres to Orthez | 288.64 mi (464.52 km) |
