| Simmerath to Navodari | 1,123.51 mi (1,808.11 km) |
| Simmerath to Negresti-Oas | 793.31 mi (1,276.72 km) |
| Simmerath to Nehoiu | 989.95 mi (1,593.18 km) |
| Simmerath to Ocna Mures | 852.55 mi (1,372.04 km) |
| Simmerath to Odobesti | 1,009.27 mi (1,624.26 km) |
| Simmerath to Odorheiu Secuiesc | 916.63 mi (1,475.17 km) |
| Simmerath to Oltenita | 1,048.57 mi (1,687.51 km) |
| Simmerath to Onesti | 981.52 mi (1,579.61 km) |
| Simmerath to Oradea | 749.38 mi (1,206.01 km) |
| Simmerath to Orastie | 841.90 mi (1,354.90 km) |
| Simmerath to Oravita | 808.40 mi (1,301.00 km) |
| Simmerath to Orsova | 849.42 mi (1,367.01 km) |
| Simmerath to Otelu Rosu | 818.00 mi (1,316.45 km) |
| Simmerath to Otopeni | 1,007.84 mi (1,621.96 km) |
| Simmerath to Ovidiu | 1,123.04 mi (1,807.36 km) |
