| Vila Nova de Gaia to Oakley (California) | 5,533.08 mi (8,904.64 km) |
| Vila Nova de Gaia to Oakton (Virginia) | 3,540.23 mi (5,697.45 km) |
| Vila Nova de Gaia to Oakville (Missouri) | 4,172.29 mi (6,714.66 km) |
| Vila Nova de Gaia to Oatfield (Oregon) | 5,203.30 mi (8,373.90 km) |
| Vila Nova de Gaia to Ocala (Florida) | 4,113.10 mi (6,619.39 km) |
| Vila Nova de Gaia to Ocean Acres (New Jersey) | 3,368.93 mi (5,421.77 km) |
| Vila Nova de Gaia to Ocean City (New Jersey) | 3,398.08 mi (5,468.69 km) |
| Vila Nova de Gaia to Ocean Pines (Maryland) | 3,450.58 mi (5,553.17 km) |
| Vila Nova de Gaia to Ocean Pointe (Hawaii) | 7,697.18 mi (12,387.41 km) |
| Vila Nova de Gaia to Ocean Springs (Mississippi) | 4,397.75 mi (7,077.49 km) |
| Vila Nova de Gaia to Oceanside (California) | 5,588.22 mi (8,993.37 km) |
| Vila Nova de Gaia to Oceanside (New York) | 3,313.13 mi (5,331.97 km) |
| Vila Nova de Gaia to Ocoee (Florida) | 4,104.41 mi (6,605.41 km) |
| Vila Nova de Gaia to Oconomowoc (Wisconsin) | 3,931.36 mi (6,326.91 km) |
| Vila Nova de Gaia to Odenton (Maryland) | 3,505.49 mi (5,641.55 km) |
