| Cluj-Napoca to Odessa (Texas) | 6,046.15 mi (9,730.33 km) |
| Cluj-Napoca to Ogden (Utah) | 5,772.47 mi (9,289.90 km) |
| Cluj-Napoca to Oildale (California) | 6,302.02 mi (10,142.12 km) |
| Cluj-Napoca to Ojus (Florida) | 5,531.82 mi (8,902.61 km) |
| Cluj-Napoca to Okemos (Michigan) | 4,850.83 mi (7,806.66 km) |
| Cluj-Napoca to Oklahoma City (Oklahoma) | 5,683.87 mi (9,147.30 km) |
| Cluj-Napoca to Okmulgee (Oklahoma) | 5,625.20 mi (9,052.88 km) |
| Cluj-Napoca to Olathe (Kansas) | 5,406.23 mi (8,700.49 km) |
| Cluj-Napoca to Old Jamestown (Missouri) | 5,254.72 mi (8,456.65 km) |
| Cluj-Napoca to Oldsmar (Florida) | 5,528.38 mi (8,897.07 km) |
| Cluj-Napoca to Olean (New York) | 4,664.79 mi (7,507.26 km) |
| Cluj-Napoca to Olive Branch (Mississippi) | 5,444.41 mi (8,761.93 km) |
| Cluj-Napoca to Olivehurst (California) | 6,127.40 mi (9,861.10 km) |
| Cluj-Napoca to Olney (Maryland) | 4,753.16 mi (7,649.47 km) |
| Cluj-Napoca to Olympia (Washington) | 5,646.13 mi (9,086.58 km) |
