| Cluj-Napoca to Oakley (California) | 6,199.43 mi (9,977.03 km) |
| Cluj-Napoca to Oakton (Virginia) | 4,774.41 mi (7,683.67 km) |
| Cluj-Napoca to Oakville (Missouri) | 5,276.61 mi (8,491.89 km) |
| Cluj-Napoca to Oatfield (Oregon) | 5,744.58 mi (9,245.02 km) |
| Cluj-Napoca to Ocala (Florida) | 5,449.47 mi (8,770.07 km) |
| Cluj-Napoca to Ocean Acres (New Jersey) | 4,616.27 mi (7,429.17 km) |
| Cluj-Napoca to Ocean City (New Jersey) | 4,651.09 mi (7,485.20 km) |
| Cluj-Napoca to Ocean Pines (Maryland) | 4,714.20 mi (7,586.77 km) |
| Cluj-Napoca to Ocean Pointe (Hawaii) | 7,731.76 mi (12,443.07 km) |
| Cluj-Napoca to Ocean Springs (Mississippi) | 5,646.56 mi (9,087.26 km) |
| Cluj-Napoca to Oceanside (California) | 6,398.26 mi (10,297.00 km) |
| Cluj-Napoca to Oceanside (New York) | 4,549.81 mi (7,322.21 km) |
| Cluj-Napoca to Ocoee (Florida) | 5,454.90 mi (8,778.81 km) |
| Cluj-Napoca to Oconomowoc (Wisconsin) | 4,971.37 mi (8,000.65 km) |
| Cluj-Napoca to Odenton (Maryland) | 4,742.36 mi (7,632.09 km) |
