| Casoria to Octeville | 978.79 mi (1,575.21 km) |
| Casoria to Oignies | 855.34 mi (1,376.54 km) |
| Casoria to Oissel | 866.58 mi (1,394.62 km) |
| Casoria to Olivet | 777.11 mi (1,250.64 km) |
| Casoria to Ollioules | 460.41 mi (740.95 km) |
| Casoria to Olonne-sur-Mer | 889.88 mi (1,432.13 km) |
| Casoria to Oloron-Sainte-Marie | 779.97 mi (1,255.24 km) |
| Casoria to Onet Village | 640.70 mi (1,031.10 km) |
| Casoria to Onnaing | 833.09 mi (1,340.73 km) |
| Casoria to Orange | 532.14 mi (856.40 km) |
| Casoria to Orchies | 848.06 mi (1,364.81 km) |
| Casoria to Orleans | 778.27 mi (1,252.51 km) |
| Casoria to Orly | 794.69 mi (1,278.93 km) |
| Casoria to Ormesson-sur-Marne | 791.34 mi (1,273.54 km) |
| Casoria to Orsay | 800.09 mi (1,287.62 km) |
