| Aci Catena to Navodari | 841.13 mi (1,353.67 km) |
| Aci Catena to Negresti-Oas | 823.81 mi (1,325.79 km) |
| Aci Catena to Nehoiu | 786.92 mi (1,266.42 km) |
| Aci Catena to Ocna Mures | 753.75 mi (1,213.04 km) |
| Aci Catena to Odobesti | 833.54 mi (1,341.46 km) |
| Aci Catena to Odorheiu Secuiesc | 795.82 mi (1,280.75 km) |
| Aci Catena to Oltenita | 748.75 mi (1,205.00 km) |
| Aci Catena to Onesti | 844.26 mi (1,358.71 km) |
| Aci Catena to Oradea | 739.93 mi (1,190.80 km) |
| Aci Catena to Orastie | 704.86 mi (1,134.36 km) |
| Aci Catena to Oravita | 615.85 mi (991.12 km) |
| Aci Catena to Orsova | 620.00 mi (997.80 km) |
| Aci Catena to Otelu Rosu | 661.69 mi (1,064.89 km) |
| Aci Catena to Otopeni | 743.88 mi (1,197.16 km) |
| Aci Catena to Ovidiu | 837.12 mi (1,347.22 km) |
