| Forest Grove to Olivares | 5,496.75 mi (8,846.17 km) |
| Forest Grove to Olivenza | 5,396.25 mi (8,684.43 km) |
| Forest Grove to Olot | 5,514.25 mi (8,874.32 km) |
| Forest Grove to Onate | 5,317.79 mi (8,558.16 km) |
| Forest Grove to Onda | 5,553.98 mi (8,938.26 km) |
| Forest Grove to Onteniente | 5,606.20 mi (9,022.31 km) |
| Forest Grove to Orihuela | 5,635.96 mi (9,070.20 km) |
| Forest Grove to Osuna | 5,543.00 mi (8,920.60 km) |
| Forest Grove to Ourense | 5,178.49 mi (8,333.97 km) |
| Forest Grove to Oviedo | 5,191.25 mi (8,354.51 km) |
| Forest Grove to Paiporta | 5,578.71 mi (8,978.06 km) |
| Forest Grove to Pajara | 5,670.36 mi (9,125.56 km) |
| Forest Grove to Palafolls | 5,550.95 mi (8,933.39 km) |
| Forest Grove to Palafrugell | 5,549.12 mi (8,930.45 km) |
| Forest Grove to Palamos | 5,552.17 mi (8,935.35 km) |
