| Barcelos to Oakley (California) | 5,515.16 mi (8,875.79 km) |
| Barcelos to Oakton (Virginia) | 3,530.55 mi (5,681.87 km) |
| Barcelos to Oakville (Missouri) | 4,160.33 mi (6,695.40 km) |
| Barcelos to Oatfield (Oregon) | 5,183.48 mi (8,342.01 km) |
| Barcelos to Ocala (Florida) | 4,106.87 mi (6,609.36 km) |
| Barcelos to Ocean Acres (New Jersey) | 3,359.38 mi (5,406.39 km) |
| Barcelos to Ocean City (New Jersey) | 3,388.72 mi (5,453.61 km) |
| Barcelos to Ocean Pines (Maryland) | 3,441.56 mi (5,538.66 km) |
| Barcelos to Ocean Pointe (Hawaii) | 7,674.37 mi (12,350.71 km) |
| Barcelos to Ocean Springs (Mississippi) | 4,389.38 mi (7,064.03 km) |
| Barcelos to Oceanside (California) | 5,572.42 mi (8,967.95 km) |
| Barcelos to Oceanside (New York) | 3,303.22 mi (5,316.02 km) |
| Barcelos to Ocoee (Florida) | 4,098.60 mi (6,596.05 km) |
| Barcelos to Oconomowoc (Wisconsin) | 3,917.80 mi (6,305.08 km) |
| Barcelos to Odenton (Maryland) | 3,495.84 mi (5,626.01 km) |
