| Ortona to Octeville | 916.83 mi (1,475.50 km) |
| Ortona to Oignies | 779.32 mi (1,254.19 km) |
| Ortona to Oissel | 800.37 mi (1,288.07 km) |
| Ortona to Olivet | 717.48 mi (1,154.67 km) |
| Ortona to Ollioules | 437.21 mi (703.62 km) |
| Ortona to Olonne-sur-Mer | 846.72 mi (1,362.67 km) |
| Ortona to Oloron-Sainte-Marie | 762.32 mi (1,226.84 km) |
| Ortona to Onet Village | 608.65 mi (979.53 km) |
| Ortona to Onnaing | 755.87 mi (1,216.46 km) |
| Ortona to Orange | 497.92 mi (801.33 km) |
| Ortona to Orchies | 771.39 mi (1,241.43 km) |
| Ortona to Orleans | 718.37 mi (1,156.10 km) |
| Ortona to Orly | 728.46 mi (1,172.34 km) |
| Ortona to Ormesson-sur-Marne | 724.49 mi (1,165.96 km) |
| Ortona to Orsay | 734.66 mi (1,182.32 km) |
