| Portimao to Orangevale (California) | 5,672.68 mi (9,129.29 km) |
| Portimao to Orchards (Washington) | 5,398.79 mi (8,688.51 km) |
| Portimao to Orcutt (California) | 5,816.44 mi (9,360.66 km) |
| Portimao to Oregon (Ohio) | 3,882.20 mi (6,247.80 km) |
| Portimao to Oregon (Wisconsin) | 4,127.39 mi (6,642.39 km) |
| Portimao to Oregon City (Oregon) | 5,417.05 mi (8,717.90 km) |
| Portimao to Orem (Utah) | 5,209.81 mi (8,384.37 km) |
| Portimao to Orinda (California) | 5,748.65 mi (9,251.56 km) |
| Portimao to Orland Park (Illinois) | 4,093.68 mi (6,588.14 km) |
| Portimao to Orlando (Florida) | 4,168.00 mi (6,707.76 km) |
| Portimao to Ormond Beach (Florida) | 4,128.37 mi (6,643.98 km) |
| Portimao to Oro Valley (Arizona) | 5,507.02 mi (8,862.70 km) |
| Portimao to Oroville (California) | 5,648.70 mi (9,090.70 km) |
| Portimao to Oshkosh (Wisconsin) | 4,058.83 mi (6,532.05 km) |
| Portimao to Oskaloosa (Iowa) | 4,326.38 mi (6,962.64 km) |
