| Lake Oswego to Olivares | 5,487.78 mi (8,831.72 km) |
| Lake Oswego to Olivenza | 5,387.36 mi (8,670.12 km) |
| Lake Oswego to Olot | 5,508.15 mi (8,864.51 km) |
| Lake Oswego to Onate | 5,310.84 mi (8,546.97 km) |
| Lake Oswego to Onda | 5,546.81 mi (8,926.73 km) |
| Lake Oswego to Onteniente | 5,598.72 mi (9,010.27 km) |
| Lake Oswego to Orihuela | 5,628.24 mi (9,057.78 km) |
| Lake Oswego to Osuna | 5,534.21 mi (8,906.45 km) |
| Lake Oswego to Ourense | 5,170.27 mi (8,320.75 km) |
| Lake Oswego to Oviedo | 5,183.68 mi (8,342.32 km) |
| Lake Oswego to Paiporta | 5,571.39 mi (8,966.29 km) |
| Lake Oswego to Pajara | 5,657.83 mi (9,105.40 km) |
| Lake Oswego to Palafolls | 5,544.80 mi (8,923.50 km) |
| Lake Oswego to Palafrugell | 5,543.11 mi (8,920.78 km) |
| Lake Oswego to Palamos | 5,546.14 mi (8,925.65 km) |
