| Marinha Grande to Navodari | 1,935.19 mi (3,114.38 km) |
| Marinha Grande to Negresti-Oas | 1,693.45 mi (2,725.34 km) |
| Marinha Grande to Nehoiu | 1,819.55 mi (2,928.28 km) |
| Marinha Grande to Ocna Mures | 1,704.05 mi (2,742.41 km) |
| Marinha Grande to Odobesti | 1,856.30 mi (2,987.42 km) |
| Marinha Grande to Odorheiu Secuiesc | 1,772.43 mi (2,852.45 km) |
| Marinha Grande to Oltenita | 1,838.45 mi (2,958.70 km) |
| Marinha Grande to Onesti | 1,842.35 mi (2,964.97 km) |
| Marinha Grande to Oradea | 1,616.97 mi (2,602.26 km) |
| Marinha Grande to Orastie | 1,670.30 mi (2,688.09 km) |
| Marinha Grande to Oravita | 1,594.30 mi (2,565.77 km) |
| Marinha Grande to Orsova | 1,628.41 mi (2,620.67 km) |
| Marinha Grande to Otelu Rosu | 1,628.26 mi (2,620.43 km) |
| Marinha Grande to Otopeni | 1,809.09 mi (2,911.45 km) |
| Marinha Grande to Ovidiu | 1,932.80 mi (3,110.54 km) |
