| Ciampino to Octeville | 871.96 mi (1,403.29 km) |
| Ciampino to Oignies | 753.90 mi (1,213.28 km) |
| Ciampino to Oissel | 760.93 mi (1,224.59 km) |
| Ciampino to Olivet | 670.06 mi (1,078.35 km) |
| Ciampino to Ollioules | 356.29 mi (573.39 km) |
| Ciampino to Olonne-sur-Mer | 782.36 mi (1,259.09 km) |
| Ciampino to Oloron-Sainte-Marie | 678.92 mi (1,092.62 km) |
| Ciampino to Onet Village | 534.74 mi (860.58 km) |
| Ciampino to Onnaing | 732.42 mi (1,178.72 km) |
| Ciampino to Orange | 425.48 mi (684.75 km) |
| Ciampino to Orchies | 747.00 mi (1,202.19 km) |
| Ciampino to Orleans | 671.26 mi (1,080.29 km) |
| Ciampino to Orly | 689.17 mi (1,109.12 km) |
| Ciampino to Ormesson-sur-Marne | 686.03 mi (1,104.06 km) |
| Ciampino to Orsay | 694.33 mi (1,117.41 km) |
