| Cluj-Napoca to Oerlinghausen | 759.29 mi (1,221.95 km) |
| Cluj-Napoca to Oestrich-Winkel | 747.55 mi (1,203.07 km) |
| Cluj-Napoca to Offenburg | 736.95 mi (1,186.01 km) |
| Cluj-Napoca to Oftersheim | 714.15 mi (1,149.32 km) |
| Cluj-Napoca to Ohrdruf | 647.54 mi (1,042.11 km) |
| Cluj-Napoca to Ohringen | 671.56 mi (1,080.78 km) |
| Cluj-Napoca to Olbernhau | 538.71 mi (866.96 km) |
| Cluj-Napoca to Olching | 580.62 mi (934.41 km) |
| Cluj-Napoca to Oldenburg | 810.42 mi (1,304.24 km) |
| Cluj-Napoca to Oldenburg in Holstein | 760.80 mi (1,224.39 km) |
| Cluj-Napoca to Olfen | 804.53 mi (1,294.77 km) |
| Cluj-Napoca to Olpe | 771.47 mi (1,241.55 km) |
| Cluj-Napoca to Olsberg | 751.60 mi (1,209.58 km) |
| Cluj-Napoca to Oranienburg | 618.92 mi (996.06 km) |
| Cluj-Napoca to Ortenberg | 707.67 mi (1,138.88 km) |
