| Ottersberg to Navodari | 1,069.36 mi (1,720.97 km) |
| Ottersberg to Negresti-Oas | 722.30 mi (1,162.43 km) |
| Ottersberg to Nehoiu | 937.30 mi (1,508.44 km) |
| Ottersberg to Ocna Mures | 801.46 mi (1,289.83 km) |
| Ottersberg to Odobesti | 947.26 mi (1,524.46 km) |
| Ottersberg to Odorheiu Secuiesc | 857.63 mi (1,380.22 km) |
| Ottersberg to Oltenita | 1,008.57 mi (1,623.14 km) |
| Ottersberg to Onesti | 915.03 mi (1,472.60 km) |
| Ottersberg to Oradea | 701.19 mi (1,128.46 km) |
| Ottersberg to Orastie | 803.09 mi (1,292.44 km) |
| Ottersberg to Oravita | 792.89 mi (1,276.04 km) |
| Ottersberg to Orsova | 832.17 mi (1,339.25 km) |
| Ottersberg to Otelu Rosu | 790.32 mi (1,271.90 km) |
| Ottersberg to Otopeni | 966.18 mi (1,554.92 km) |
| Ottersberg to Ovidiu | 1,069.73 mi (1,721.56 km) |
