| Trecastagni to Navodari | 842.59 mi (1,356.02 km) |
| Trecastagni to Negresti-Oas | 824.07 mi (1,326.22 km) |
| Trecastagni to Nehoiu | 787.97 mi (1,268.12 km) |
| Trecastagni to Ocna Mures | 754.30 mi (1,213.93 km) |
| Trecastagni to Odobesti | 834.60 mi (1,343.16 km) |
| Trecastagni to Odorheiu Secuiesc | 796.58 mi (1,281.98 km) |
| Trecastagni to Oltenita | 750.09 mi (1,207.16 km) |
| Trecastagni to Onesti | 845.20 mi (1,360.22 km) |
| Trecastagni to Oradea | 740.08 mi (1,191.04 km) |
| Trecastagni to Orastie | 705.41 mi (1,135.25 km) |
| Trecastagni to Oravita | 616.30 mi (991.83 km) |
| Trecastagni to Orsova | 620.64 mi (998.82 km) |
| Trecastagni to Otelu Rosu | 662.16 mi (1,065.65 km) |
| Trecastagni to Otopeni | 745.07 mi (1,199.07 km) |
| Trecastagni to Ovidiu | 838.59 mi (1,349.58 km) |
