| Oregon to Opwijk | 3,979.74 mi (6,404.77 km) |
| Oregon to Ostend | 3,922.81 mi (6,313.15 km) |
| Oregon to Oud-Heverlee | 4,002.66 mi (6,441.67 km) |
| Oregon to Oud-Turnhout | 3,999.01 mi (6,435.79 km) |
| Oregon to Oudenaarde | 3,960.99 mi (6,374.60 km) |
| Oregon to Oudenburg | 3,927.25 mi (6,320.30 km) |
| Oregon to Oupeye | 4,044.27 mi (6,508.63 km) |
| Oregon to Overijse | 3,999.16 mi (6,436.03 km) |
| Oregon to Overpelt | 4,018.79 mi (6,467.61 km) |
| Oregon to Paal | 4,015.32 mi (6,462.04 km) |
| Oregon to Peer | 4,022.96 mi (6,474.32 km) |
| Oregon to Pepinster | 4,055.66 mi (6,526.96 km) |
| Oregon to Peruwelz | 3,971.03 mi (6,390.76 km) |
| Oregon to Perwez | 4,015.23 mi (6,461.89 km) |
| Oregon to Philippeville | 4,018.93 mi (6,467.84 km) |
