| Delfzijl to Navodari | 1,159.83 mi (1,866.57 km) |
| Delfzijl to Negresti-Oas | 813.79 mi (1,309.67 km) |
| Delfzijl to Nehoiu | 1,027.30 mi (1,653.28 km) |
| Delfzijl to Ocna Mures | 890.83 mi (1,433.66 km) |
| Delfzijl to Odobesti | 1,038.38 mi (1,671.12 km) |
| Delfzijl to Odorheiu Secuiesc | 948.20 mi (1,525.98 km) |
| Delfzijl to Oltenita | 1,097.01 mi (1,765.46 km) |
| Delfzijl to Onesti | 1,006.56 mi (1,619.91 km) |
| Delfzijl to Oradea | 789.71 mi (1,270.92 km) |
| Delfzijl to Orastie | 890.65 mi (1,433.36 km) |
| Delfzijl to Oravita | 876.25 mi (1,410.18 km) |
| Delfzijl to Orsova | 916.07 mi (1,474.27 km) |
| Delfzijl to Otelu Rosu | 875.95 mi (1,409.70 km) |
| Delfzijl to Otopeni | 1,054.75 mi (1,697.46 km) |
| Delfzijl to Ovidiu | 1,160.10 mi (1,867.00 km) |
