| Vila Nova de Gaia to Odessa (Texas) | 4,987.96 mi (8,027.35 km) |
| Vila Nova de Gaia to Ogden (Utah) | 5,000.88 mi (8,048.14 km) |
| Vila Nova de Gaia to Oildale (California) | 5,553.09 mi (8,936.84 km) |
| Vila Nova de Gaia to Ojus (Florida) | 4,135.06 mi (6,654.73 km) |
| Vila Nova de Gaia to Okemos (Michigan) | 3,759.51 mi (6,050.35 km) |
| Vila Nova de Gaia to Oklahoma City (Oklahoma) | 4,617.33 mi (7,430.88 km) |
| Vila Nova de Gaia to Okmulgee (Oklahoma) | 4,541.95 mi (7,309.56 km) |
| Vila Nova de Gaia to Olathe (Kansas) | 4,362.80 mi (7,021.25 km) |
| Vila Nova de Gaia to Old Jamestown (Missouri) | 4,156.78 mi (6,689.69 km) |
| Vila Nova de Gaia to Oldsmar (Florida) | 4,182.24 mi (6,730.66 km) |
| Vila Nova de Gaia to Olean (New York) | 3,501.18 mi (5,634.61 km) |
| Vila Nova de Gaia to Olive Branch (Mississippi) | 4,276.70 mi (6,882.69 km) |
| Vila Nova de Gaia to Olivehurst (California) | 5,474.54 mi (8,810.42 km) |
| Vila Nova de Gaia to Olney (Maryland) | 3,521.37 mi (5,667.09 km) |
| Vila Nova de Gaia to Olympia (Washington) | 5,134.57 mi (8,263.29 km) |
