| Piran to Octeville | 761.76 mi (1,225.93 km) |
| Piran to Oignies | 595.40 mi (958.20 km) |
| Piran to Oissel | 638.88 mi (1,028.17 km) |
| Piran to Olivet | 575.34 mi (925.92 km) |
| Piran to Ollioules | 415.54 mi (668.75 km) |
| Piran to Olonne-sur-Mer | 738.00 mi (1,187.69 km) |
| Piran to Oloron-Sainte-Marie | 717.51 mi (1,154.72 km) |
| Piran to Onet Village | 542.22 mi (872.61 km) |
| Piran to Onnaing | 569.79 mi (916.98 km) |
| Piran to Orange | 439.53 mi (707.35 km) |
| Piran to Orchies | 586.18 mi (943.36 km) |
| Piran to Orleans | 575.52 mi (926.21 km) |
| Piran to Orly | 569.62 mi (916.72 km) |
| Piran to Ormesson-sur-Marne | 564.30 mi (908.16 km) |
| Piran to Orsay | 577.50 mi (929.40 km) |
