| Lake Oswego to Opole | 5,393.51 mi (8,680.02 km) |
| Lake Oswego to Orzesze | 5,441.59 mi (8,757.39 km) |
| Lake Oswego to Osowa | 5,172.48 mi (8,324.30 km) |
| Lake Oswego to Ostroda | 5,244.55 mi (8,440.29 km) |
| Lake Oswego to Ostroleka | 5,312.41 mi (8,549.49 km) |
| Lake Oswego to Ostrow Mazowiecka | 5,334.95 mi (8,585.78 km) |
| Lake Oswego to Ostrow Wielkopolski | 5,330.79 mi (8,579.08 km) |
| Lake Oswego to Ostrowiec Swietokrzyski | 5,443.18 mi (8,759.95 km) |
| Lake Oswego to Ostrzeszow | 5,347.39 mi (8,605.79 km) |
| Lake Oswego to Oswiecim | 5,457.79 mi (8,783.46 km) |
| Lake Oswego to Otwock | 5,366.61 mi (8,636.72 km) |
| Lake Oswego to Ozarow Mazowiecki | 5,351.94 mi (8,613.12 km) |
| Lake Oswego to Ozimek | 5,398.68 mi (8,688.33 km) |
| Lake Oswego to Ozorkow | 5,339.45 mi (8,593.02 km) |
| Lake Oswego to Pabianice | 5,360.97 mi (8,627.64 km) |
