| Cluj-Napoca to Oswego (Illinois) | 5,038.99 mi (8,109.48 km) |
| Cluj-Napoca to Oswego (New York) | 4,528.61 mi (7,288.09 km) |
| Cluj-Napoca to Otsego (Minnesota) | 5,023.92 mi (8,085.21 km) |
| Cluj-Napoca to Ottawa (Illinois) | 5,072.72 mi (8,163.76 km) |
| Cluj-Napoca to Ottawa (Kansas) | 5,436.38 mi (8,749.01 km) |
| Cluj-Napoca to Ottumwa (Iowa) | 5,211.53 mi (8,387.14 km) |
| Cluj-Napoca to Overland (Missouri) | 5,265.18 mi (8,473.49 km) |
| Cluj-Napoca to Overland Park (Kansas) | 5,401.62 mi (8,693.07 km) |
| Cluj-Napoca to Overlea (Maryland) | 4,721.33 mi (7,598.24 km) |
| Cluj-Napoca to Oviedo (Florida) | 5,436.74 mi (8,749.59 km) |
| Cluj-Napoca to Owasso (Oklahoma) | 5,582.11 mi (8,983.54 km) |
| Cluj-Napoca to Owatonna (Minnesota) | 5,074.24 mi (8,166.20 km) |
| Cluj-Napoca to Owensboro (Kentucky) | 5,198.90 mi (8,366.82 km) |
| Cluj-Napoca to Owings Mills (Maryland) | 4,729.68 mi (7,611.68 km) |
| Cluj-Napoca to Owosso (Michigan) | 4,828.06 mi (7,770.01 km) |
