| Mettlach to Oakley (California) | 5,619.12 mi (9,043.09 km) |
| Mettlach to Oakton (Virginia) | 4,002.05 mi (6,440.67 km) |
| Mettlach to Oakville (Missouri) | 4,539.50 mi (7,305.62 km) |
| Mettlach to Oatfield (Oregon) | 5,204.46 mi (8,375.77 km) |
| Mettlach to Ocala (Florida) | 4,662.19 mi (7,503.06 km) |
| Mettlach to Ocean Acres (New Jersey) | 3,840.05 mi (6,179.97 km) |
| Mettlach to Ocean City (New Jersey) | 3,874.06 mi (6,234.69 km) |
| Mettlach to Ocean Pines (Maryland) | 3,935.63 mi (6,333.79 km) |
| Mettlach to Ocean Pointe (Hawaii) | 7,454.14 mi (11,996.29 km) |
| Mettlach to Ocean Springs (Mississippi) | 4,877.49 mi (7,849.56 km) |
| Mettlach to Oceanside (California) | 5,768.17 mi (9,282.96 km) |
| Mettlach to Oceanside (New York) | 3,775.11 mi (6,075.46 km) |
| Mettlach to Ocoee (Florida) | 4,665.33 mi (7,508.12 km) |
| Mettlach to Oconomowoc (Wisconsin) | 4,248.14 mi (6,836.72 km) |
| Mettlach to Odenton (Maryland) | 3,969.20 mi (6,387.81 km) |
