| Romanshorn to Nasaud | 702.72 mi (1,130.91 km) |
| Romanshorn to Navodari | 949.26 mi (1,527.68 km) |
| Romanshorn to Negresti-Oas | 653.39 mi (1,051.53 km) |
| Romanshorn to Nehoiu | 819.30 mi (1,318.53 km) |
| Romanshorn to Ocna Mures | 687.50 mi (1,106.42 km) |
| Romanshorn to Odobesti | 846.97 mi (1,363.07 km) |
| Romanshorn to Odorheiu Secuiesc | 755.81 mi (1,216.36 km) |
| Romanshorn to Oltenita | 863.92 mi (1,390.34 km) |
| Romanshorn to Onesti | 825.05 mi (1,327.79 km) |
| Romanshorn to Oradea | 588.87 mi (947.69 km) |
| Romanshorn to Orastie | 665.56 mi (1,071.12 km) |
| Romanshorn to Oravita | 613.02 mi (986.56 km) |
| Romanshorn to Orsova | 653.37 mi (1,051.50 km) |
| Romanshorn to Otelu Rosu | 632.78 mi (1,018.37 km) |
| Romanshorn to Otopeni | 826.16 mi (1,329.58 km) |
