| Saint-Louis to Navodari | 1,032.29 mi (1,661.31 km) |
| Saint-Louis to Negresti-Oas | 735.77 mi (1,184.11 km) |
| Saint-Louis to Nehoiu | 902.51 mi (1,452.44 km) |
| Saint-Louis to Ocna Mures | 770.78 mi (1,240.44 km) |
| Saint-Louis to Odobesti | 930.26 mi (1,497.11 km) |
| Saint-Louis to Odorheiu Secuiesc | 839.08 mi (1,350.36 km) |
| Saint-Louis to Oltenita | 946.49 mi (1,523.22 km) |
| Saint-Louis to Onesti | 908.28 mi (1,461.74 km) |
| Saint-Louis to Oradea | 672.03 mi (1,081.53 km) |
| Saint-Louis to Orastie | 748.73 mi (1,204.96 km) |
| Saint-Louis to Oravita | 695.17 mi (1,118.77 km) |
| Saint-Louis to Orsova | 735.36 mi (1,183.44 km) |
| Saint-Louis to Otelu Rosu | 715.64 mi (1,151.71 km) |
| Saint-Louis to Otopeni | 908.96 mi (1,462.83 km) |
| Saint-Louis to Ovidiu | 1,031.03 mi (1,659.29 km) |
