| Comacchio to Octeville | 731.78 mi (1,177.68 km) |
| Comacchio to Oignies | 584.28 mi (940.31 km) |
| Comacchio to Oissel | 612.13 mi (985.14 km) |
| Comacchio to Olivet | 536.92 mi (864.08 km) |
| Comacchio to Ollioules | 333.17 mi (536.19 km) |
| Comacchio to Olonne-sur-Mer | 685.32 mi (1,102.92 km) |
| Comacchio to Oloron-Sainte-Marie | 644.00 mi (1,036.42 km) |
| Comacchio to Onet Village | 472.61 mi (760.60 km) |
| Comacchio to Onnaing | 560.36 mi (901.81 km) |
| Comacchio to Orange | 365.82 mi (588.72 km) |
| Comacchio to Orchies | 576.07 mi (927.10 km) |
| Comacchio to Orleans | 537.48 mi (864.99 km) |
| Comacchio to Orly | 540.79 mi (870.32 km) |
| Comacchio to Ormesson-sur-Marne | 536.28 mi (863.05 km) |
| Comacchio to Orsay | 547.69 mi (881.43 km) |
