| Oro Valley to Octeville | 5,310.14 mi (8,545.85 km) |
| Oro Valley to Oignies | 5,440.53 mi (8,755.69 km) |
| Oro Valley to Oissel | 5,420.94 mi (8,724.17 km) |
| Oro Valley to Olivet | 5,512.35 mi (8,871.26 km) |
| Oro Valley to Ollioules | 5,867.00 mi (9,442.03 km) |
| Oro Valley to Olonne-sur-Mer | 5,428.84 mi (8,736.87 km) |
| Oro Valley to Oloron-Sainte-Marie | 5,611.29 mi (9,030.50 km) |
| Oro Valley to Onet Village | 5,688.03 mi (9,154.00 km) |
| Oro Valley to Onnaing | 5,464.88 mi (8,794.88 km) |
| Oro Valley to Orange | 5,782.75 mi (9,306.43 km) |
| Oro Valley to Orchies | 5,448.95 mi (8,769.24 km) |
| Oro Valley to Orleans | 5,511.02 mi (8,869.13 km) |
| Oro Valley to Orly | 5,492.86 mi (8,839.90 km) |
| Oro Valley to Ormesson-sur-Marne | 5,496.29 mi (8,845.42 km) |
| Oro Valley to Orsay | 5,487.42 mi (8,831.15 km) |
