| Del Rio to Octeville | 5,082.38 mi (8,179.31 km) |
| Del Rio to Oignies | 5,237.38 mi (8,428.75 km) |
| Del Rio to Oissel | 5,200.54 mi (8,369.45 km) |
| Del Rio to Olivet | 5,281.90 mi (8,500.40 km) |
| Del Rio to Ollioules | 5,612.94 mi (9,033.16 km) |
| Del Rio to Olonne-sur-Mer | 5,172.68 mi (8,324.62 km) |
| Del Rio to Oloron-Sainte-Marie | 5,330.55 mi (8,578.70 km) |
| Del Rio to Onet Village | 5,430.21 mi (8,739.08 km) |
| Del Rio to Onnaing | 5,263.32 mi (8,470.49 km) |
| Del Rio to Orange | 5,532.39 mi (8,903.53 km) |
| Del Rio to Orchies | 5,246.81 mi (8,443.92 km) |
| Del Rio to Orleans | 5,280.94 mi (8,498.86 km) |
| Del Rio to Orly | 5,272.07 mi (8,484.58 km) |
| Del Rio to Ormesson-sur-Marne | 5,276.44 mi (8,491.61 km) |
| Del Rio to Orsay | 5,265.44 mi (8,473.91 km) |
