| Oliveira de Frades to Oakley (California) | 5,569.24 mi (8,962.82 km) |
| Oliveira de Frades to Oakton (Virginia) | 3,571.93 mi (5,748.47 km) |
| Oliveira de Frades to Oakville (Missouri) | 4,205.56 mi (6,768.20 km) |
| Oliveira de Frades to Oatfield (Oregon) | 5,239.85 mi (8,432.73 km) |
| Oliveira de Frades to Ocala (Florida) | 4,142.00 mi (6,665.90 km) |
| Oliveira de Frades to Ocean Acres (New Jersey) | 3,400.55 mi (5,472.65 km) |
| Oliveira de Frades to Ocean City (New Jersey) | 3,429.56 mi (5,519.34 km) |
| Oliveira de Frades to Ocean Pines (Maryland) | 3,481.79 mi (5,603.39 km) |
| Oliveira de Frades to Ocean Pointe (Hawaii) | 7,733.46 mi (12,445.80 km) |
| Oliveira de Frades to Ocean Springs (Mississippi) | 4,428.41 mi (7,126.84 km) |
| Oliveira de Frades to Oceanside (California) | 5,623.57 mi (9,050.27 km) |
| Oliveira de Frades to Oceanside (New York) | 3,345.01 mi (5,383.27 km) |
| Oliveira de Frades to Ocoee (Florida) | 4,132.95 mi (6,651.33 km) |
| Oliveira de Frades to Oconomowoc (Wisconsin) | 3,965.60 mi (6,382.02 km) |
| Oliveira de Frades to Odenton (Maryland) | 3,537.18 mi (5,692.54 km) |
