| Cluj-Napoca to Orangevale (California) | 6,145.17 mi (9,889.69 km) |
| Cluj-Napoca to Orchards (Washington) | 5,725.77 mi (9,214.73 km) |
| Cluj-Napoca to Orcutt (California) | 6,369.52 mi (10,250.76 km) |
| Cluj-Napoca to Oregon (Ohio) | 4,868.39 mi (7,834.92 km) |
| Cluj-Napoca to Oregon (Wisconsin) | 5,010.39 mi (8,063.45 km) |
| Cluj-Napoca to Oregon City (Oregon) | 5,749.06 mi (9,252.23 km) |
| Cluj-Napoca to Orem (Utah) | 5,821.90 mi (9,369.45 km) |
| Cluj-Napoca to Orinda (California) | 6,216.80 mi (10,004.97 km) |
| Cluj-Napoca to Orland Park (Illinois) | 5,026.56 mi (8,089.46 km) |
| Cluj-Napoca to Orlando (Florida) | 5,452.09 mi (8,774.29 km) |
| Cluj-Napoca to Ormond Beach (Florida) | 5,400.63 mi (8,691.48 km) |
| Cluj-Napoca to Oro Valley (Arizona) | 6,278.14 mi (10,103.69 km) |
| Cluj-Napoca to Oroville (California) | 6,100.82 mi (9,818.32 km) |
| Cluj-Napoca to Oshkosh (Wisconsin) | 4,926.20 mi (7,927.95 km) |
| Cluj-Napoca to Oskaloosa (Iowa) | 5,204.32 mi (8,375.54 km) |
