| Aosta to Navodari | 1,041.44 mi (1,676.04 km) |
| Aosta to Negresti-Oas | 774.49 mi (1,246.42 km) |
| Aosta to Nehoiu | 917.08 mi (1,475.90 km) |
| Aosta to Ocna Mures | 792.98 mi (1,276.18 km) |
| Aosta to Odobesti | 949.77 mi (1,528.51 km) |
| Aosta to Odorheiu Secuiesc | 861.92 mi (1,387.13 km) |
| Aosta to Oltenita | 949.85 mi (1,528.64 km) |
| Aosta to Onesti | 932.08 mi (1,500.03 km) |
| Aosta to Oradea | 700.91 mi (1,128.00 km) |
| Aosta to Orastie | 763.98 mi (1,229.51 km) |
| Aosta to Oravita | 697.94 mi (1,123.23 km) |
| Aosta to Orsova | 735.96 mi (1,184.42 km) |
| Aosta to Otelu Rosu | 725.62 mi (1,167.77 km) |
| Aosta to Otopeni | 915.48 mi (1,473.33 km) |
| Aosta to Ovidiu | 1,039.66 mi (1,673.18 km) |
