| Povoa de Santa Iria to Orangevale (California) | 5,570.11 mi (8,964.23 km) |
| Povoa de Santa Iria to Orchards (Washington) | 5,289.83 mi (8,513.16 km) |
| Povoa de Santa Iria to Orcutt (California) | 5,717.89 mi (9,202.05 km) |
| Povoa de Santa Iria to Oregon (Ohio) | 3,798.92 mi (6,113.77 km) |
| Povoa de Santa Iria to Oregon (Wisconsin) | 4,038.76 mi (6,499.75 km) |
| Povoa de Santa Iria to Oregon City (Oregon) | 5,308.32 mi (8,542.92 km) |
| Povoa de Santa Iria to Orem (Utah) | 5,111.61 mi (8,226.33 km) |
| Povoa de Santa Iria to Orinda (California) | 5,646.18 mi (9,086.66 km) |
| Povoa de Santa Iria to Orland Park (Illinois) | 4,007.99 mi (6,450.23 km) |
| Povoa de Santa Iria to Orlando (Florida) | 4,110.62 mi (6,615.41 km) |
| Povoa de Santa Iria to Ormond Beach (Florida) | 4,069.65 mi (6,549.47 km) |
| Povoa de Santa Iria to Oro Valley (Arizona) | 5,418.15 mi (8,719.67 km) |
| Povoa de Santa Iria to Oroville (California) | 5,545.22 mi (8,924.17 km) |
| Povoa de Santa Iria to Oshkosh (Wisconsin) | 3,968.90 mi (6,387.34 km) |
| Povoa de Santa Iria to Oskaloosa (Iowa) | 4,238.43 mi (6,821.09 km) |
