| Oregon to Olivares | 3,986.13 mi (6,415.06 km) |
| Oregon to Olivenza | 3,897.59 mi (6,272.56 km) |
| Oregon to Olot | 4,210.83 mi (6,776.68 km) |
| Oregon to Onate | 3,965.63 mi (6,382.07 km) |
| Oregon to Onda | 4,168.44 mi (6,708.46 km) |
| Oregon to Onteniente | 4,194.08 mi (6,749.72 km) |
| Oregon to Orihuela | 4,205.36 mi (6,767.87 km) |
| Oregon to Osuna | 4,042.22 mi (6,505.33 km) |
| Oregon to Ourense | 3,743.42 mi (6,024.45 km) |
| Oregon to Oviedo | 3,802.52 mi (6,119.57 km) |
| Oregon to Paiporta | 4,180.72 mi (6,728.23 km) |
| Oregon to Pajara | 3,923.92 mi (6,314.94 km) |
| Oregon to Palafolls | 4,240.89 mi (6,825.06 km) |
| Oregon to Palafrugell | 4,249.87 mi (6,839.50 km) |
| Oregon to Palamos | 4,250.99 mi (6,841.31 km) |
