| Somain to Navodari | 1,250.00 mi (2,011.68 km) |
| Somain to Negresti-Oas | 924.11 mi (1,487.20 km) |
| Somain to Nehoiu | 1,116.79 mi (1,797.29 km) |
| Somain to Ocna Mures | 979.90 mi (1,577.00 km) |
| Somain to Odobesti | 1,137.71 mi (1,830.96 km) |
| Somain to Odorheiu Secuiesc | 1,045.00 mi (1,681.76 km) |
| Somain to Oltenita | 1,172.41 mi (1,886.82 km) |
| Somain to Onesti | 1,110.81 mi (1,787.68 km) |
| Somain to Oradea | 876.99 mi (1,411.38 km) |
| Somain to Orastie | 966.91 mi (1,556.10 km) |
| Somain to Oravita | 928.22 mi (1,493.82 km) |
| Somain to Orsova | 969.24 mi (1,559.84 km) |
| Somain to Otelu Rosu | 940.75 mi (1,514.00 km) |
| Somain to Otopeni | 1,132.30 mi (1,822.25 km) |
| Somain to Ovidiu | 1,249.37 mi (2,010.67 km) |
