| Miercurea-Ciuc to Navodari | 196.13 mi (315.65 km) |
| Miercurea-Ciuc to Negresti-Oas | 152.90 mi (246.07 km) |
| Miercurea-Ciuc to Nehoiu | 73.63 mi (118.49 km) |
| Miercurea-Ciuc to Ocna Mures | 92.58 mi (149.00 km) |
| Miercurea-Ciuc to Odobesti | 73.18 mi (117.77 km) |
| Miercurea-Ciuc to Odorheiu Secuiesc | 24.06 mi (38.72 km) |
| Miercurea-Ciuc to Oltenita | 162.20 mi (261.03 km) |
| Miercurea-Ciuc to Onesti | 46.70 mi (75.15 km) |
| Miercurea-Ciuc to Oradea | 190.29 mi (306.24 km) |
| Miercurea-Ciuc to Orastie | 129.50 mi (208.41 km) |
| Miercurea-Ciuc to Oravita | 218.52 mi (351.67 km) |
| Miercurea-Ciuc to Orsova | 199.74 mi (321.45 km) |
| Miercurea-Ciuc to Otelu Rosu | 175.59 mi (282.58 km) |
| Miercurea-Ciuc to Otopeni | 125.69 mi (202.28 km) |
| Miercurea-Ciuc to Ovidiu | 196.96 mi (316.97 km) |
