| Oro Valley to Opwijk | 5,459.84 mi (8,786.77 km) |
| Oro Valley to Ostend | 5,405.75 mi (8,699.72 km) |
| Oro Valley to Oud-Heverlee | 5,482.00 mi (8,822.43 km) |
| Oro Valley to Oud-Turnhout | 5,471.47 mi (8,805.48 km) |
| Oro Valley to Oudenaarde | 5,445.05 mi (8,762.96 km) |
| Oro Valley to Oudenburg | 5,410.31 mi (8,707.06 km) |
| Oro Valley to Oupeye | 5,520.38 mi (8,884.19 km) |
| Oro Valley to Overijse | 5,479.68 mi (8,818.68 km) |
| Oro Valley to Overpelt | 5,490.31 mi (8,835.80 km) |
| Oro Valley to Paal | 5,490.00 mi (8,835.29 km) |
| Oro Valley to Peer | 5,495.25 mi (8,843.75 km) |
| Oro Valley to Pepinster | 5,532.50 mi (8,903.70 km) |
| Oro Valley to Peruwelz | 5,458.82 mi (8,785.13 km) |
| Oro Valley to Perwez | 5,496.18 mi (8,845.25 km) |
| Oro Valley to Philippeville | 5,505.72 mi (8,860.61 km) |
