| Portimao to Opole | 1,601.59 mi (2,577.51 km) |
| Portimao to Orzesze | 1,619.63 mi (2,606.54 km) |
| Portimao to Osowa | 1,746.68 mi (2,811.02 km) |
| Portimao to Ostroda | 1,773.71 mi (2,854.51 km) |
| Portimao to Ostroleka | 1,812.72 mi (2,917.29 km) |
| Portimao to Ostrow Mazowiecka | 1,817.60 mi (2,925.14 km) |
| Portimao to Ostrow Wielkopolski | 1,627.44 mi (2,619.12 km) |
| Portimao to Ostrowiec Swietokrzyski | 1,747.81 mi (2,812.84 km) |
| Portimao to Ostrzeszow | 1,624.52 mi (2,614.41 km) |
| Portimao to Oswiecim | 1,635.89 mi (2,632.71 km) |
| Portimao to Otwock | 1,773.99 mi (2,854.96 km) |
| Portimao to Ozarow Mazowiecki | 1,758.80 mi (2,830.51 km) |
| Portimao to Ozimek | 1,612.86 mi (2,595.65 km) |
| Portimao to Ozorkow | 1,693.24 mi (2,725.00 km) |
| Portimao to Pabianice | 1,687.54 mi (2,715.83 km) |
