| Vila Nova de Gaia to Oswego (Illinois) | 3,970.36 mi (6,389.68 km) |
| Vila Nova de Gaia to Oswego (New York) | 3,374.02 mi (5,429.96 km) |
| Vila Nova de Gaia to Otsego (Minnesota) | 4,083.75 mi (6,572.16 km) |
| Vila Nova de Gaia to Ottawa (Illinois) | 4,003.42 mi (6,442.88 km) |
| Vila Nova de Gaia to Ottawa (Kansas) | 4,393.51 mi (7,070.67 km) |
| Vila Nova de Gaia to Ottumwa (Iowa) | 4,177.13 mi (6,722.44 km) |
| Vila Nova de Gaia to Overland (Missouri) | 4,165.73 mi (6,704.09 km) |
| Vila Nova de Gaia to Overland Park (Kansas) | 4,356.64 mi (7,011.33 km) |
| Vila Nova de Gaia to Overlea (Maryland) | 3,488.14 mi (5,613.62 km) |
| Vila Nova de Gaia to Oviedo (Florida) | 4,083.88 mi (6,572.38 km) |
| Vila Nova de Gaia to Owasso (Oklahoma) | 4,507.61 mi (7,254.30 km) |
| Vila Nova de Gaia to Owatonna (Minnesota) | 4,106.72 mi (6,609.13 km) |
| Vila Nova de Gaia to Owensboro (Kentucky) | 4,046.57 mi (6,512.32 km) |
| Vila Nova de Gaia to Owings Mills (Maryland) | 3,499.97 mi (5,632.66 km) |
| Vila Nova de Gaia to Owosso (Michigan) | 3,739.93 mi (6,018.83 km) |
