| Grudziadz to Navodari | 774.07 mi (1,245.74 km) |
| Grudziadz to Negresti-Oas | 438.49 mi (705.68 km) |
| Grudziadz to Nehoiu | 655.71 mi (1,055.26 km) |
| Grudziadz to Ocna Mures | 540.05 mi (869.12 km) |
| Grudziadz to Odobesti | 649.41 mi (1,045.13 km) |
| Grudziadz to Odorheiu Secuiesc | 574.39 mi (924.39 km) |
| Grudziadz to Oltenita | 741.01 mi (1,192.54 km) |
| Grudziadz to Onesti | 613.04 mi (986.59 km) |
| Grudziadz to Oradea | 464.66 mi (747.79 km) |
| Grudziadz to Orastie | 563.62 mi (907.05 km) |
| Grudziadz to Oravita | 598.28 mi (962.83 km) |
| Grudziadz to Orsova | 627.20 mi (1,009.37 km) |
| Grudziadz to Otelu Rosu | 573.58 mi (923.09 km) |
| Grudziadz to Otopeni | 700.00 mi (1,126.54 km) |
| Grudziadz to Ovidiu | 775.70 mi (1,248.37 km) |
