| Drogheda to Navodari | 1,690.85 mi (2,721.16 km) |
| Drogheda to Negresti-Oas | 1,350.37 mi (2,173.21 km) |
| Drogheda to Nehoiu | 1,557.25 mi (2,506.15 km) |
| Drogheda to Ocna Mures | 1,419.58 mi (2,284.59 km) |
| Drogheda to Odobesti | 1,572.52 mi (2,530.73 km) |
| Drogheda to Odorheiu Secuiesc | 1,480.75 mi (2,383.03 km) |
| Drogheda to Oltenita | 1,620.53 mi (2,607.99 km) |
| Drogheda to Onesti | 1,542.36 mi (2,482.20 km) |
| Drogheda to Oradea | 1,316.65 mi (2,118.94 km) |
| Drogheda to Orastie | 1,413.09 mi (2,274.15 km) |
| Drogheda to Oravita | 1,384.29 mi (2,227.80 km) |
| Drogheda to Orsova | 1,425.24 mi (2,293.70 km) |
| Drogheda to Otelu Rosu | 1,391.89 mi (2,240.02 km) |
| Drogheda to Otopeni | 1,579.12 mi (2,541.34 km) |
| Drogheda to Ovidiu | 1,690.72 mi (2,720.95 km) |
