| Oregon to Opole | 4,499.32 mi (7,240.95 km) |
| Oregon to Orzesze | 4,549.46 mi (7,321.64 km) |
| Oregon to Osowa | 4,366.48 mi (7,027.17 km) |
| Oregon to Ostroda | 4,445.05 mi (7,153.62 km) |
| Oregon to Ostroleka | 4,524.05 mi (7,280.76 km) |
| Oregon to Ostrow Mazowiecka | 4,546.30 mi (7,316.56 km) |
| Oregon to Ostrow Wielkopolski | 4,455.37 mi (7,170.23 km) |
| Oregon to Ostrowiec Swietokrzyski | 4,608.86 mi (7,417.24 km) |
| Oregon to Ostrzeszow | 4,468.85 mi (7,191.92 km) |
| Oregon to Oswiecim | 4,570.80 mi (7,355.99 km) |
| Oregon to Otwock | 4,554.10 mi (7,329.12 km) |
| Oregon to Ozarow Mazowiecki | 4,534.21 mi (7,297.10 km) |
| Oregon to Ozimek | 4,508.94 mi (7,256.43 km) |
| Oregon to Ozorkow | 4,493.10 mi (7,230.94 km) |
| Oregon to Pabianice | 4,509.57 mi (7,257.45 km) |
