| Lake Oswego to Opwijk | 5,062.44 mi (8,147.21 km) |
| Lake Oswego to Ostend | 5,015.54 mi (8,071.73 km) |
| Lake Oswego to Oud-Heverlee | 5,082.23 mi (8,179.05 km) |
| Lake Oswego to Oud-Turnhout | 5,063.02 mi (8,148.15 km) |
| Lake Oswego to Oudenaarde | 5,054.00 mi (8,133.62 km) |
| Lake Oswego to Oudenburg | 5,019.98 mi (8,078.88 km) |
| Lake Oswego to Oupeye | 5,113.90 mi (8,230.03 km) |
| Lake Oswego to Overijse | 5,081.64 mi (8,178.11 km) |
| Lake Oswego to Overpelt | 5,079.49 mi (8,174.65 km) |
| Lake Oswego to Paal | 5,083.41 mi (8,180.95 km) |
| Lake Oswego to Peer | 5,085.15 mi (8,183.76 km) |
| Lake Oswego to Pepinster | 5,126.28 mi (8,249.95 km) |
| Lake Oswego to Peruwelz | 5,072.15 mi (8,162.83 km) |
| Lake Oswego to Perwez | 5,097.76 mi (8,204.05 km) |
| Lake Oswego to Philippeville | 5,114.84 mi (8,231.54 km) |
