| Onda to Nasaud | 1,326.45 mi (2,134.71 km) |
| Onda to Navodari | 1,501.56 mi (2,416.53 km) |
| Onda to Negresti-Oas | 1,292.51 mi (2,080.09 km) |
| Onda to Nehoiu | 1,393.34 mi (2,242.36 km) |
| Onda to Ocna Mures | 1,287.94 mi (2,072.73 km) |
| Onda to Odobesti | 1,433.08 mi (2,306.33 km) |
| Onda to Odorheiu Secuiesc | 1,354.56 mi (2,179.96 km) |
| Onda to Oltenita | 1,403.18 mi (2,258.20 km) |
| Onda to Onesti | 1,423.21 mi (2,290.43 km) |
| Onda to Oradea | 1,209.81 mi (1,947.00 km) |
| Onda to Orastie | 1,249.77 mi (2,011.31 km) |
| Onda to Oravita | 1,167.61 mi (1,879.09 km) |
| Onda to Orsova | 1,198.64 mi (1,929.03 km) |
| Onda to Otelu Rosu | 1,205.37 mi (1,939.86 km) |
| Onda to Otopeni | 1,377.00 mi (2,216.06 km) |
