| Odorheiu Secuiesc to Oakley (California) | 6,263.40 mi (10,079.97 km) |
| Odorheiu Secuiesc to Oakton (Virginia) | 4,859.00 mi (7,819.80 km) |
| Odorheiu Secuiesc to Oakville (Missouri) | 5,357.61 mi (8,622.24 km) |
| Odorheiu Secuiesc to Oatfield (Oregon) | 5,804.85 mi (9,342.01 km) |
| Odorheiu Secuiesc to Ocala (Florida) | 5,535.39 mi (8,908.36 km) |
| Odorheiu Secuiesc to Ocean Acres (New Jersey) | 4,701.26 mi (7,565.94 km) |
| Odorheiu Secuiesc to Ocean City (New Jersey) | 4,736.14 mi (7,622.09 km) |
| Odorheiu Secuiesc to Ocean Pines (Maryland) | 4,799.39 mi (7,723.87 km) |
| Odorheiu Secuiesc to Ocean Pointe (Hawaii) | 7,759.47 mi (12,487.67 km) |
| Odorheiu Secuiesc to Ocean Springs (Mississippi) | 5,730.65 mi (9,222.59 km) |
| Odorheiu Secuiesc to Oceanside (California) | 6,467.36 mi (10,408.21 km) |
| Odorheiu Secuiesc to Oceanside (New York) | 4,634.67 mi (7,458.77 km) |
| Odorheiu Secuiesc to Ocoee (Florida) | 5,541.05 mi (8,917.46 km) |
| Odorheiu Secuiesc to Oconomowoc (Wisconsin) | 5,051.13 mi (8,129.01 km) |
| Odorheiu Secuiesc to Odenton (Maryland) | 4,827.03 mi (7,768.36 km) |
