| Castelli Calepio to Navodari | 917.00 mi (1,475.77 km) |
| Castelli Calepio to Negresti-Oas | 657.68 mi (1,058.43 km) |
| Castelli Calepio to Nehoiu | 793.41 mi (1,276.87 km) |
| Castelli Calepio to Ocna Mures | 671.05 mi (1,079.94 km) |
| Castelli Calepio to Odobesti | 826.85 mi (1,330.69 km) |
| Castelli Calepio to Odorheiu Secuiesc | 739.90 mi (1,190.75 km) |
| Castelli Calepio to Oltenita | 825.08 mi (1,327.84 km) |
| Castelli Calepio to Onesti | 810.07 mi (1,303.68 km) |
| Castelli Calepio to Oradea | 581.23 mi (935.40 km) |
| Castelli Calepio to Orastie | 640.76 mi (1,031.20 km) |
| Castelli Calepio to Oravita | 573.34 mi (922.70 km) |
| Castelli Calepio to Orsova | 611.19 mi (983.62 km) |
| Castelli Calepio to Otelu Rosu | 601.70 mi (968.34 km) |
| Castelli Calepio to Otopeni | 790.93 mi (1,272.87 km) |
| Castelli Calepio to Ovidiu | 915.18 mi (1,472.84 km) |
