| Altopascio to Navodari | 889.02 mi (1,430.74 km) |
| Altopascio to Negresti-Oas | 673.07 mi (1,083.21 km) |
| Altopascio to Nehoiu | 774.77 mi (1,246.87 km) |
| Altopascio to Ocna Mures | 665.85 mi (1,071.58 km) |
| Altopascio to Odobesti | 813.06 mi (1,308.50 km) |
| Altopascio to Odorheiu Secuiesc | 732.79 mi (1,179.31 km) |
| Altopascio to Oltenita | 792.53 mi (1,275.46 km) |
| Altopascio to Onesti | 801.80 mi (1,290.37 km) |
| Altopascio to Oradea | 588.69 mi (947.40 km) |
| Altopascio to Orastie | 628.46 mi (1,011.42 km) |
| Altopascio to Oravita | 548.95 mi (883.45 km) |
| Altopascio to Orsova | 582.36 mi (937.21 km) |
| Altopascio to Otelu Rosu | 584.80 mi (941.14 km) |
| Altopascio to Otopeni | 762.92 mi (1,227.81 km) |
| Altopascio to Ovidiu | 886.65 mi (1,426.92 km) |
