| Cluj-Napoca to Nuth | 851.89 mi (1,370.99 km) |
| Cluj-Napoca to Oegstgeest | 932.68 mi (1,501.01 km) |
| Cluj-Napoca to Oirschot | 885.93 mi (1,425.76 km) |
| Cluj-Napoca to Oisterwijk | 891.54 mi (1,434.79 km) |
| Cluj-Napoca to Oldebroek | 880.63 mi (1,417.24 km) |
| Cluj-Napoca to Oldenzaal | 836.53 mi (1,346.27 km) |
| Cluj-Napoca to Ommen | 861.78 mi (1,386.90 km) |
| Cluj-Napoca to Oosterend | 887.64 mi (1,428.52 km) |
| Cluj-Napoca to Oosterhout | 906.82 mi (1,459.39 km) |
| Cluj-Napoca to Oosterwolde | 878.63 mi (1,414.02 km) |
| Cluj-Napoca to Oostzaan | 920.86 mi (1,481.97 km) |
| Cluj-Napoca to Opmeer | 923.98 mi (1,487.00 km) |
| Cluj-Napoca to Oss | 881.79 mi (1,419.11 km) |
| Cluj-Napoca to Oud-Beijerland | 928.75 mi (1,494.68 km) |
| Cluj-Napoca to Oudenbosch | 919.77 mi (1,480.23 km) |
