| Castenaso to Octeville | 709.83 mi (1,142.36 km) |
| Castenaso to Oignies | 570.42 mi (918.01 km) |
| Castenaso to Oissel | 591.91 mi (952.59 km) |
| Castenaso to Olivet | 512.60 mi (824.94 km) |
| Castenaso to Ollioules | 295.81 mi (476.07 km) |
| Castenaso to Olonne-sur-Mer | 655.36 mi (1,054.70 km) |
| Castenaso to Oloron-Sainte-Marie | 608.00 mi (978.49 km) |
| Castenaso to Onet Village | 437.83 mi (704.62 km) |
| Castenaso to Onnaing | 547.35 mi (880.88 km) |
| Castenaso to Orange | 330.15 mi (531.33 km) |
| Castenaso to Orchies | 562.68 mi (905.55 km) |
| Castenaso to Orleans | 513.30 mi (826.08 km) |
| Castenaso to Orly | 520.14 mi (837.09 km) |
| Castenaso to Ormesson-sur-Marne | 515.98 mi (830.38 km) |
| Castenaso to Orsay | 526.62 mi (847.52 km) |
